chore(deps): update actions/checkout action to v6

.gitea/workflows/build.yaml

@@ -11,7 +11,7 @@ jobs:
       - run: echo "🐧 This job is now running on a ${{ runner.os }} server hosted by Gitea!"
       - run: echo "🔎 The name of your branch is ${{ github.ref }} and your repository is ${{ github.repository }}."
       - name: Check out repository code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - run: echo "💡 The ${{ github.repository }} repository has been cloned to the runner."
       - run: echo "🖥️ The workflow is now ready to test your code on the runner."
       - uses: https://github.com/actions/setup-python@v6

.gitea/workflows/renovate.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     container: ghcr.io/renovatebot/renovate:42.19.3
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: renovate
         env:
           LOG_LEVEL: "info"