Upgrade postgres to meet 5.1 requirements

Author: crazyserver

.github/workflows/structure.yml

@@ -28,7 +28,7 @@ jobs:
     - name: Setting up DB ${{ env.dbtype }}
       uses: m4nu56/postgresql-action@v1
       with:
-        postgresql version: 14
+        postgresql version: 15
         postgresql db: test
         postgresql user: test
         postgresql password: test