Build examples in CI

This doesn’t verify they actually work, but at least this verified they
can be built.

.github/workflows/ci.yaml

@@ -16,6 +16,16 @@ jobs:
       - run: npm ci
       - run: npx eslint .
 
+  examples:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v2
+        with: { node-version: 16 }
+      - run: npm ci
+      - run: npm run prepack
+      - run: npm run build --workspaces
+
   pack:
     runs-on: ubuntu-latest
     steps:

README.md

@@ -116,7 +116,7 @@ window.MonacoEnvironment = {
           new URL('monaco-editor/esm/vs/language/typescript/ts.worker', import.meta.url),
         );
       case 'yaml':
-        return new Worker(new URL('monaco-yaml/lib/esm/yaml.worker', import.meta.url));
+        return new Worker(new URL('monaco-yaml/yaml.worker', import.meta.url));
       default:
         throw new Error(`Unknown label ${label}`);
     }