Apply suggestions from code review

Co-authored-by: David Graham <[email protected]>

Author: muan

.github/workflows/nodejs.yml

@@ -13,7 +13,7 @@ jobs:
     - name: npm install, build, and test
       run: |
         npm install
-        npm run build --if-present
+        npm run build
         npm test
       env:
         CI: true

README.md

@@ -12,7 +12,7 @@ $ npm install @github/details-menu-element
 
 ### Script
 
-Import as ES modules:
+Import as a module:
 
 ```js
 import '@github/details-menu-element'