Verify that the bundle schema is up to date in CI (#2061)

## Changes

I noticed a diff in the schema in #2052.

This check should be performed automatically.

## Tests

This PR includes a commit that changes the schema to check that the
workflow actually fails.

.github/workflows/push.yml

@@ -90,6 +90,13 @@ jobs:
         with:
           go-version: 1.23.4
 
+      - name: Verify that the schema is up to date
+        run: |
+          if ! ( make schema && git diff --exit-code ); then
+            echo "The schema is not up to date. Please run 'make schema' and commit the changes."
+            exit 1
+          fi
+
       # Github repo: https://github.com/ajv-validator/ajv-cli
       - name: Install ajv-cli
         run: npm install -g ajv-cli@5.0.0