Update docs and rename 'tsc' => 'check' in precommit hooks, see phets…

…ims/perennial#364

js/server/QuickServer.js

@@ -239,7 +239,7 @@ class QuickServer {
   async testTSC() {
     winston.info( 'QuickServer: tsc' );
 
-    // Use the "node" executable so that it works across platforms, launching `tsc` as the command on windows results in ENOENT -4058.
+    // Use grunt so that it works across platforms, launching `tsc` as the command on windows results in ENOENT -4058.
     // Pretty false will make the output more machine readable.
     return execute( gruntCommand, [ 'check', '--everything', '--pretty', 'false' ], `${this.rootDir}/chipper`, EXECUTE_OPTIONS );
   }