Upgrade versions in GitHub Action workflow

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     services:
       db:
-        image: postgres:15
+        image: postgres:16
         env:
           POSTGRES_PASSWORD: postgres
         ports:
@@ -31,7 +31,7 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version: 20
       - name: Enable Corepack
         run: corepack enable
       - name: Get yarn cache directory path