[site] in CI, use fetch-depth 0

.github/workflows/docs.yml

@@ -15,6 +15,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@a5ac7e51b41094c92402da3b24376905380afc29 # v4
+        with:
+          # The full history is required to make mkdocs' git-revision-date-localized plugin work
+          fetch-depth: 0
       - uses: dtolnay/rust-toolchain@stable
       - uses: Swatinem/rust-cache@23bce251a8cd2ffc3c1075eaa2367cf899916d84 # v2
       - name: Install nextest for help text in docs