workflows: Update setup-uv action to the latest version

Author: jelly

.github/workflows/main.yml

@@ -17,7 +17,7 @@ jobs:
         python-version: 3.14
     - name: Install uv
       id: setup-uv
-      uses: astral-sh/setup-uv@v6
+      uses: astral-sh/setup-uv@v8.1.0
       with:
         version: "0.7.19"
         enable-cache: true