Merge pull request #220 from uPortal-Project/renovate/actions-checkout-4.x

chore(deps): update actions/checkout action to v4

Author: ChristianMurphy

.github/workflows/CI.yml

@@ -41,7 +41,7 @@ jobs:
     runs-on: ${{ matrix.platform }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
       - name: Set up JDK
         uses: actions/setup-java@v3
         with: