test: update prepare.spec.js

Author: erisu

spec/unit/prepare.spec.js

@@ -950,7 +950,7 @@ describe('prepare', () => {
 
             prepare.__set__('updateWww', jasmine.createSpy('updateWww'));
             prepare.__set__('updateIcons', jasmine.createSpy('updateIcons').and.returnValue(Promise.resolve()));
-            prepare.__set__('updateProjectSplashScreen', jasmine.createSpy('updateProjectSplashScreen'));
+            prepare.__set__('updateProjectTheme', jasmine.createSpy('updateProjectTheme'));
             prepare.__set__('warnForDeprecatedSplashScreen', jasmine.createSpy('warnForDeprecatedSplashScreen')
                 .and.returnValue(Promise.resolve()));
             prepare.__set__('updateFileResources', jasmine.createSpy('updateFileResources').and.returnValue(Promise.resolve()));