docs: pin 0.4.2 links to models removed from main to v0.4.2 (#6416)

Signed-off-by: Zhiyu Li <zhiyul@nvidia.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: ZhiyuLi-Nvidia

docs/fern/versions/0.4.2/pages/index.mdx

@@ -159,22 +159,22 @@ Megatron Bridge provides out-of-the-box bridges and training recipes for a wide
 
 ### Nemotron (NVIDIA)
 
-- [Nemotron Nano v2](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/nemotronh) — [recipes (9B/12B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/nemotronh/nemotron_nano_v2.py)
+- [Nemotron Nano v2](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/nemotronh) — [recipes (9B/12B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/v0.4.2/src/megatron/bridge/recipes/nemotronh/nemotron_nano_v2.py)
 - [Nemotron Nano v3](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/nemotronh) — [recipes (30B-A3B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/nemotronh/nemotron_3_nano.py)
 - [Nemotron Super v3](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/nemotronh) — [recipes (120B-A12B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/nemotronh/nemotron_3_super.py)
-- [Llama Nemotron](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/llama_nemotron)
-- [Nemotron Nano v2 VL](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/nemotron_vl) — [recipes (9B/12B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/nemotron_vl/nemotron_nano_v2_vl.py)
+- [Llama Nemotron](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/v0.4.2/src/megatron/bridge/models/llama_nemotron)
+- [Nemotron Nano v2 VL](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/nemotron_vl) — [recipes (9B/12B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/v0.4.2/src/megatron/bridge/recipes/nemotron_vl/nemotron_nano_v2_vl.py)
 
 ### Large Language Models (LLM)
 
-- [DeepSeek V2 / V2 Lite](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/deepseek) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/deepseek/deepseek_v2.py)
+- [DeepSeek V2 / V2 Lite](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/deepseek) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/v0.4.2/src/megatron/bridge/recipes/deepseek/deepseek_v2.py)
 - [DeepSeek V3](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/deepseek) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/deepseek/deepseek_v3.py)
-- [Gemma / Gemma 2](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/gemma) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/gemma/gemma2.py)
+- [Gemma / Gemma 2](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/gemma) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/v0.4.2/src/megatron/bridge/recipes/gemma/gemma2.py)
 - [Gemma 3](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/gemma) — [recipes (1B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/gemma/gemma3.py)
 - [GLM-4.5](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/glm) — [recipes (106B-Air/355B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/glm/glm45.py)
 - [GPT-oss](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/gpt_oss) — [recipes (20B/120B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/gpt_oss/gpt_oss.py)
 - [Kimi K2](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/kimi) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/kimi/kimi_k2.py)
-- [Llama 2](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/llama) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/llama/llama2.py)
+- [Llama 2](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/llama) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/v0.4.2/src/megatron/bridge/recipes/llama/llama2.py)
 - [Llama 3 / 3.1 / 3.2 / 3.3](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/llama) — [recipes](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/llama/llama3.py)
 - [Mamba](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/mamba)
 - [Ministral](https://github.com/NVIDIA-NeMo/Megatron-Bridge/tree/main/src/megatron/bridge/models/ministral3) — [recipes (3B/8B/14B)](https://github.com/NVIDIA-NeMo/Megatron-Bridge/blob/main/src/megatron/bridge/recipes/ministral3/ministral3.py)