add git for uv-dynamic-versioning

Signed-off-by: Weston Steimel <author@code.w.steimel.me.uk>

Author: westonsteimel

.github/workflows/validations.yaml

@@ -21,7 +21,7 @@ jobs:
       contents: read
     steps:
       - name: Install OS dependencies
-        run: apk add --no-cache uv
+        run: apk add --no-cache uv git
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd #v6.0.2
         with:
           persist-credentials: false