Update astral-sh/setup-uv action to v6

Author: renovate[bot]

.github/workflows/test.yaml

@@ -16,7 +16,7 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: Install uv
-        uses: astral-sh/setup-uv@1edb52594c857e2b5b13128931090f0640537287 # v5
+        uses: astral-sh/setup-uv@6b9c6063abd6010835644d4c2e1bef4cf5cd0fca # v6
         with:
           enable-cache: true
           cache-dependency-glob: "uv.lock"