use older setup-uv action

.github/workflows/mypy.yaml

@@ -14,13 +14,13 @@ jobs:
       - name: Install git-annex
         run: |
           sudo apt-get update
-          sudo apt-get install -y git-annex
+          sudo apt-get install -y git-annex 
       - name: Check out the repository
         uses: https://github.com/RouxAntoine/checkout@v4.1.8
         with:
           show-progress: true
       - name: Install uv
-        uses: https://github.com/astral-sh/setup-uv@v7
+        uses: https://github.com/astral-sh/setup-uv@v6
         with:
           python-version: ${{ matrix.python-version }}
           enable-cache: true