ci: fetch-depth for dynamic versioning

Author: joscha

.github/workflows/test.yml

@@ -12,6 +12,8 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v5
+        with:
+          fetch-depth: 0
       - uses: cachix/install-nix-action@v31
       - uses: cachix/cachix-action@v16
         with: