ci: Use actions/checkout@v4

v3 is deprecated

.github/workflows/github-action-checks.yml

@@ -5,17 +5,17 @@ jobs:
   Link-Format-Checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: scripts/link-format-chk.sh
   Build-Table-Checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: scripts/buildtable.pl >/tmp/table.mediawiki || exit 1
   Diff-Checks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
         with:
           fetch-depth: 2
       - run: scripts/diffcheck.sh