ci:(deps): update astral-sh/setup-uv action to v7

Author: renovate[bot]

.github/workflows/tox-test.yml

@@ -16,7 +16,7 @@ jobs:
     - uses: actions/checkout@v5
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v6
+      uses: astral-sh/setup-uv@v7
 
     - name: Install tox-uv
       run: |