Upgrade: Bump the actions group across 1 directory with 6 updates

Bumps the actions group with 6 updates in the / directory:

| Package | From | To |
| --- | --- | --- |
| [actions/checkout](https://github.com/actions/checkout) | `4` | `6` |
| [actions/setup-python](https://github.com/actions/setup-python) | `5` | `6` |
| [OpenTTD/actions/.github/workflows/rw-py-codeql.yml](https://github.com/openttd/actions) | `5` | `6` |
| [OpenTTD/actions/.github/workflows/rw-py-flake8.yml](https://github.com/openttd/actions) | `5` | `6` |
| [OpenTTD/actions/.github/workflows/rw-py-black.yml](https://github.com/openttd/actions) | `5` | `6` |
| [OpenTTD/actions/.github/workflows/rw-annotation-check.yml](https://github.com/openttd/actions) | `5` | `6` |



Updates `actions/checkout` from 4 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v6)

Updates `actions/setup-python` from 5 to 6
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v5...v6)

Updates `OpenTTD/actions/.github/workflows/rw-py-codeql.yml` from 5 to 6
- [Release notes](https://github.com/openttd/actions/releases)
- [Commits](OpenTTD/actions@v5...v6)

Updates `OpenTTD/actions/.github/workflows/rw-py-flake8.yml` from 5 to 6
- [Release notes](https://github.com/openttd/actions/releases)
- [Commits](OpenTTD/actions@v5...v6)

Updates `OpenTTD/actions/.github/workflows/rw-py-black.yml` from 5 to 6
- [Release notes](https://github.com/openttd/actions/releases)
- [Commits](OpenTTD/actions@v5...v6)

Updates `OpenTTD/actions/.github/workflows/rw-annotation-check.yml` from 5 to 6
- [Release notes](https://github.com/openttd/actions/releases)
- [Commits](OpenTTD/actions@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: actions/setup-python
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: OpenTTD/actions/.github/workflows/rw-py-codeql.yml
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: OpenTTD/actions/.github/workflows/rw-py-flake8.yml
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: OpenTTD/actions/.github/workflows/rw-py-black.yml
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
- dependency-name: OpenTTD/actions/.github/workflows/rw-annotation-check.yml
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/publish.yml

@@ -32,7 +32,7 @@ jobs:
 
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         ref: ${{ github.event.pull_request.head.sha || github.ref }}
         submodules: true
@@ -44,7 +44,7 @@ jobs:
         bundler-cache: true
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.11
 

.github/workflows/testing.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         submodules: true
 
@@ -35,7 +35,7 @@ jobs:
         bundler-cache: true
 
     - name: Set up Python
-      uses: actions/setup-python@v5
+      uses: actions/setup-python@v6
       with:
         python-version: 3.11
 
@@ -49,19 +49,19 @@ jobs:
 
   codeql:
     name: CodeQL
-    uses: OpenTTD/actions/.github/workflows/rw-py-codeql.yml@v5
+    uses: OpenTTD/actions/.github/workflows/rw-py-codeql.yml@v6
     with:
       python-version: 3.11
 
   flake8:
     name: Flake8
-    uses: OpenTTD/actions/.github/workflows/rw-py-flake8.yml@v5
+    uses: OpenTTD/actions/.github/workflows/rw-py-flake8.yml@v6
     with:
       python-path: fetch_downloads
 
   black:
     name: Black
-    uses: OpenTTD/actions/.github/workflows/rw-py-black.yml@v5
+    uses: OpenTTD/actions/.github/workflows/rw-py-black.yml@v6
     with:
       python-path: fetch_downloads
       python-version: 3.11
@@ -74,4 +74,4 @@ jobs:
     - black
     # not codeql, as that reports its own status
 
-    uses: OpenTTD/actions/.github/workflows/rw-annotation-check.yml@v5
+    uses: OpenTTD/actions/.github/workflows/rw-annotation-check.yml@v6