Fix Nerdbank.GitVersioning shallow clone issue in GitHub Actions

Add fetch-depth: 0 to checkout actions to enable full git history
for version height calculation.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: si618

.github/workflows/workflow.yml

@@ -18,6 +18,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@main
+        with:
+          fetch-depth: 0
 
       - name: Setup dotnet
         uses: actions/setup-dotnet@v4
@@ -43,6 +45,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@main
+        with:
+          fetch-depth: 0
 
       - name: Setup dotnet
         uses: actions/setup-dotnet@v4