chore(deps): update actions/checkout action to v6 (#1395)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -8,30 +8,30 @@ jobs:
   analyze:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: kuhnroyal/flutter-fvm-config-action/setup@v3
       - run: flutter pub get
       - run: flutter analyze --fatal-infos
 
   format:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: kuhnroyal/flutter-fvm-config-action/setup@v3
       - run: flutter pub get
       - run: dart format --set-exit-if-changed .
 
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: kuhnroyal/flutter-fvm-config-action/setup@v3
       - run: flutter test
 
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: kuhnroyal/flutter-fvm-config-action/setup@v3
       - name: Clean Rust toolchain cache
         run: rm -rf ~/.rustup ~/.cargo

.github/workflows/snap.yml

@@ -10,7 +10,7 @@ jobs:
   build_and_release_linux_snap_edge_amd64:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 5
       - run: echo ${{ vars.FORCED_UPDATE_THRESHOLD }} > forced_update.txt
@@ -29,7 +29,7 @@ jobs:
   build_and_release_linux_snap_edge_arm64:
     runs-on: ubuntu-24.04-arm
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 5
       - run: echo ${{ vars.FORCED_UPDATE_THRESHOLD }} > forced_update.txt