Update astral-sh/setup-uv action to v6 (#42)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

setup-uv/action.yaml

@@ -19,7 +19,7 @@ runs:
   using: "composite"
   steps:
   - name: Setup uv
-    uses: astral-sh/setup-uv@d4b2f3b6ecc6e67c4457f6d3e41ec42d3d0fcb86 # v5.4.2
+    uses: astral-sh/setup-uv@557e51de59eb14aaaba2ed9621916900a91d50c6 # v6.6.1
     with:
       version: ${{ inputs.version }}