docs: Update README.md

Co-authored-by: Chris J. Shull <[email protected]>

Author: usefulthink

README.md

@@ -73,8 +73,8 @@ importLibrary("maps").then(({ Map }) => {
 });
 ```
 
-If you use web components from the Google Maps JavaScript API (e.g. `gmp-map`,
-and `gmp-advanced-marker`), you need to import them as well:
+If you use custom HTML element from the Google Maps JavaScript API (e.g. `<gmp-map>`,
+and `<gmp-advanced-marker>`), you need to import them as well:
 
 ```javascript
 import { setOptions, importLibrary } from "@googlemaps/js-api-loader";