Bump actions/checkout from 4 to 6 (#285)

Bumps [actions/checkout](https://github.com/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)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Maurits van Beusekom <maurits@vnbskm.nl>

Author: dependabot[bot]

.github/workflows/geocoding.yaml

@@ -32,7 +32,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # Make sure the stable version of Flutter is available
       - uses: subosito/flutter-action@v2

.github/workflows/geocoding_android.yaml

@@ -31,7 +31,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # Make sure the stable version of Flutter is available
       - uses: subosito/flutter-action@v2

.github/workflows/geocoding_ios.yaml

@@ -32,7 +32,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # Make sure the stable version of Flutter is available
       - uses: subosito/flutter-action@v2

.github/workflows/geocoding_platform_interface.yaml

@@ -31,7 +31,7 @@ jobs:
     # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       # Make sure the stable version of Flutter is available
       - uses: subosito/flutter-action@v2