chore(ci): use GPT-6.1 Sol for compatibility review (#4796)

Signed-off-by: Simon Scatton <sscatton@nvidia.com>

Author: SDAChess

tasks/scripts/codex_compatibility.py

@@ -19,7 +19,7 @@
 from codex_compatibility_report import validate_review, write_report
 
 ASSETS = Path(__file__).resolve().parents[2] / ".github" / "prompts"
-MODEL = "openai/openai/gpt-5.6-sol"
+MODEL = "openai/openai/gpt-6.1-sol"
 ENDPOINT = "https://inference-api.nvidia.com/v1"