build(deps): update astral-sh/setup-uv action to v8

Author: renovate[bot]

.github/workflows/docs.yaml

@@ -20,7 +20,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: "Install uv"
-        uses: astral-sh/setup-uv@v5
+        uses: astral-sh/setup-uv@v8.1.0
         with:
           enable-cache: true