Update action version

Author: davorg

.github/workflows/perltest.yml

@@ -16,7 +16,7 @@ jobs:
         perl: [ 'latest' ]
     name: Perl ${{ matrix.perl }} on ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Set up perl
         uses: shogo82148/actions-setup-perl@v1
         with: