Bump service container to use node 20

Author: ejscribner

.github/workflows/cb-service-container.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [16.x]
+        node-version: [20.x]
     steps:
       - name: Update repositories
         run: |