Remove 'preferred' field from version 0.3.0 (#2942)

Signed-off-by: oliver könig <okoenig@nvidia.com>

Author: ko3n1g

docs/versions1.json

@@ -12,8 +12,7 @@
   {
     "name": "0.3.0",
     "version": "0.3.0",
-    "url": "https://docs.nvidia.com/nemo/megatron-bridge/0.3.0/",
-    "preferred": true
+    "url": "https://docs.nvidia.com/nemo/megatron-bridge/0.3.0/"
   },
   {
     "version": "0.2.0",
@@ -23,4 +22,4 @@
     "version": "0.1.0",
     "url": "https://docs.nvidia.com/nemo/megatron-bridge/0.1.0/"
   }
-]
+]