chore(deps): update actions/checkout action to v6 (#4601)

Co-authored-by: homarr-renovate[bot] <158783068+homarr-renovate[bot]@users.noreply.github.com>

.github/workflows/deployment-docker-image.yml

@@ -55,7 +55,7 @@ jobs:
           app-id: ${{ secrets.RENOVATE_MERGE_APP_ID }}
           permission-contents: write # required to commit package.json & changelog changes, merge them to dev and publish the release
 
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         if: env.SKIP_RELEASE == 'false'
         with:
           persist-credentials: false
@@ -115,7 +115,7 @@ jobs:
     outputs:
       digest: ${{ steps.build.outputs.digest }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.release.outputs.git_ref }}
 
@@ -154,7 +154,7 @@ jobs:
     outputs:
       digest: ${{ steps.build.outputs.digest }}
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           ref: ${{ needs.release.outputs.git_ref }}