Update actions/cache action to v6

Author: renovate[bot]

.github/workflows/sync_base.yaml

@@ -21,7 +21,7 @@ jobs:
         id: setup-python
         with:
           python-version: '3.14'
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: |
             ~/.commodore-venv/

.github/workflows/test.yaml

@@ -35,7 +35,7 @@ jobs:
         with:
           python-version: 3.14
       - uses: Gr1N/setup-poetry@v9
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: ~/.cache/pypoetry/virtualenvs
           key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}
@@ -66,7 +66,7 @@ jobs:
       with:
         python-version: 3.14
     - uses: Gr1N/setup-poetry@v9
-    - uses: actions/cache@v5
+    - uses: actions/cache@v6
       with:
         path: ~/.cache/pypoetry/virtualenvs
         key: ${{ runner.os }}-poetry-${{ hashFiles('poetry.lock') }}

{{ cookiecutter.slug }}/.github/workflows/test.yaml

@@ -51,7 +51,7 @@ jobs:
       - uses: actions/setup-go@v6
         with:
           go-version: {% raw %}${{ env.GO_VERSION }}{% endraw %}
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: ~/go/pkg/mod
           key: {% raw %}${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}{% endraw %}