ci: pin setup-uv to v8.2.0

astral-sh/setup-uv publishes only full version tags, so @v8 fails to
resolve. Use the exact v8.2.0 tag (checkout keeps its floating @v6).

Author: OmarAlJarrah

.github/workflows/ci.yml

@@ -26,7 +26,7 @@ jobs:
         uses: actions/checkout@v6
 
       - name: Install uv
-        uses: astral-sh/setup-uv@v8
+        uses: astral-sh/setup-uv@v8.2.0
         with:
           enable-cache: true
           python-version: ${{ matrix.python-version }}