build: invalid browser name in karma config (#14081)

Fixes the name of the default browser in the Karma config being invalid and throwing an error when running the tests locally.

Author: crisbeto

test/karma-browsers.json

@@ -1,5 +1,5 @@
 {
-  "ChromeHeadlesSAUCELABSocal": {
+  "ChromeHeadlessLocal": {
     "base": "ChromeHeadless",
     "flags": [
       "--window-size=1024,768"

test/karma.conf.js

@@ -1,8 +1,7 @@
 const path = require('path');
 const {customLaunchers, platformMap} = require('./browser-providers');
 
-module.exports = (config) => {
-
+module.exports = config => {
   config.set({
     basePath: path.join(__dirname, '..'),
     frameworks: ['jasmine'],