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)
- [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] <[email protected]>

Author: dependabot[bot]

.github/workflows/build-iso.yml

@@ -23,7 +23,7 @@ jobs:
       IS_SIGNED: ${{ steps.set.outputs.IS_SIGNED }}
     steps:
       - name: Checkout github actions
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set environment variables
         uses: ./.github/actions/config

.github/workflows/build.yml

@@ -29,7 +29,7 @@ jobs:
       IS_SIGNED: ${{ steps.set.outputs.IS_SIGNED }}
     steps:
       - name: Checkout github actions
-        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v4
+        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v4
 
       - name: Set environment variables
         uses: ./.github/actions/config

.github/workflows/initial_setup.yml

@@ -14,7 +14,7 @@ jobs:
     if: github.repository != 'AlmaLinux/atomic-respin-template'
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Run initial setup script
         run: |