Do not perform deep checkout of submodules

Fixes shader-slang#5465

Author: mkeshavaNV

.github/workflows/ci.yml

@@ -85,7 +85,8 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: "recursive"
-          fetch-depth: "0"
+          fetch-depth: "1" # Fetch only the latest commit (shallow clone)
+          shallow-submodules: "true" # Fetch submodules at only the latest commit
       - id: filter
         run: |
           # This step prevents subsequent steps from running if only documentation was changed