Update actions/checkout action to v7

Author: xdev-renovate

.github/workflows/broken-links.yml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 15
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - run: mv .github/.lycheeignore .lycheeignore
 

.github/workflows/report-gha-workflow-security-problems.yml

@@ -17,7 +17,7 @@ jobs:
     # Only run this in our repos (Prevent notification spam by forks)
     if: ${{ github.repository_owner == 'xdev-software' }}
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - name: Check
         id: check

.github/workflows/sync-labels.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 10
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
         with:
           sparse-checkout: .github/labels.yml