Bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [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] <[email protected]>

Author: dependabot[bot]

.github/workflows/editorconfig.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Get editorconfig-checker
       uses: editorconfig-checker/action-editorconfig-checker@4b6cd6190d435e7e084fb35e36a096e98506f7b9 #v2.1.0

.github/workflows/ftl-build.yml

@@ -63,7 +63,7 @@ jobs:
           echo "PLATFORM_PAIR=${platform//\//-}" >> $GITHUB_ENV
       -
         name: Checkout Repo
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 #v5.0.0
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 #v4.3.1
       -
         name: Docker meta (Docker Hub and GitHub Container Registry)
         id: meta
@@ -156,7 +156,7 @@ jobs:
     steps:
       -
         name: Checkout Repo
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 #v5.0.0
+        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 #v4.3.1
       -
         name: Download digests
         uses: actions/download-artifact@018cc2cf5baa6db3ef3c5f8a56943fffe632ef53 #v6.0.0