Add fetch-depth back to checkout

Author: blowdart

.github/workflows/generate-publish-docs.yml

@@ -37,6 +37,7 @@ jobs:
     - name: 'Checkout'
       uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
       with:
+        fetch-depth: 0 # avoid shallow clone so nbgv can do its work.
         persist-credentials: false
 
     - name: 'Setup .NET SDK'