Switch to latest/supported GH actions in test.yml

Author: kneckinator

.github/workflows/test.yml

@@ -17,7 +17,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Detect unreleased dependencies
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - run: |
           for reqfile in requirements.txt test-requirements.txt ; do
               if [ -f ${reqfile} ] ; then
@@ -54,7 +54,7 @@ jobs:
         ports:
           - 5432:5432
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 #        with:
 #          persist-credentials: false