Remove extraneous tab char in Firestore SDK (#3728)

* Firestore Externs: @type -> @typedef

* Add @OverRide to Recaptcha Verify method in Auth Externs

* Add proper closure `@license` annotation to generated internal rollup boilerplate

* Google LLC + SPDX License ID

* Fix tab char in Firestore SDK

Author: richieforeman

packages/firestore/src/remote/rest_connection.ts

@@ -122,7 +122,7 @@ export abstract class RestConnection implements Connection {
     // Content-Type: text/plain will avoid preflight requests which might
     // mess with CORS and redirects by proxies. If we add custom headers
     // we will need to change this code to potentially use the $httpOverwrite
-    // parameter supported by ESF to avoid	triggering preflight requests.
+    // parameter supported by ESF to avoid triggering preflight requests.
     headers['Content-Type'] = 'text/plain';
 
     if (token) {