Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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>

Author: dependabot[bot]

.github/workflows/build_android_signed.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 

.github/workflows/build_android_signed_qt6.yml

@@ -40,7 +40,7 @@ jobs:
 
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 

.github/workflows/build_android_unsigned.yml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Checkout repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 

.github/workflows/build_package_Rock5.yml

@@ -30,7 +30,7 @@ jobs:
           echo "BRANCH=${GITHUB_REF##*/}" >> $GITHUB_ENV    
              
       - name: Checkout repository and submodules
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: recursive
       - name: Building QOpenHD in CHROOT

.github/workflows/build_package_rpi.yml

@@ -27,7 +27,7 @@ jobs:
         remove-haskell: 'true'
         overprovision-lvm: 'true'
 
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
       with:
         submodules: recursive
 

.github/workflows/build_package_x86_jammy.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-22.04
     steps:
     - name: Checkout repository and submodules
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         submodules: recursive
 

.github/workflows/ubuntu22_build_test.yml

@@ -23,7 +23,7 @@ jobs:
 
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: recursive
 

.github/workflows/ubuntu22_build_test_qt6.yml

@@ -22,7 +22,7 @@ jobs:
 
     steps:
       - name: Checkout repository and submodules
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           submodules: recursive