ci(github-action)!: Update actions/cache action (v4.3.0 → v6.1.0)

| datasource  | package       | from   | to     |
| ----------- | ------------- | ------ | ------ |
| github-tags | actions/cache | v4.3.0 | v6.1.0 |

Author: erhardt-consulting-bot

.github/workflows/test.yaml

@@ -22,7 +22,7 @@ jobs:
       uses: astral-sh/setup-uv@d0cc045d04ccac9d8b7881df0226f9e82c39688e # v6
 
     - name: Cache uv dependencies
-      uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+      uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
       with:
         path: .venv
         key: ${{ runner.os }}-uv-${{ hashFiles('**/pyproject.toml') }}