chore(deps): update astral-sh/setup-uv action to v6.8.0 (#1365)

Co-authored-by: grafanarenovatebot[bot] <146220760+grafanarenovatebot[bot]@users.noreply.github.com>

Author: grafanarenovatebot[bot]

.github/workflows/reusable-zizmor.yml

@@ -361,7 +361,7 @@ jobs:
           fi
 
       - name: Setup UV
-        uses: astral-sh/setup-uv@b75a909f75acd358c2196fb9a5f1299a9a8868a4 # v6.7.0
+        uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e # v6.8.0
         with:
           enable-cache: true
           activate-environment: true