chore: fix the name of the tested file (#775)

* Jest template: fix the name of the tested file (Hello.vue instead of HelloWorld.vue)

* Jest template: fix the name of the tested file

Author: dunglas

packages/@vue/cli-plugin-unit-jest/generator/template/test/unit/HelloWorld.spec.js

@@ -1,7 +1,7 @@
 import { shallow } from '@vue/test-utils'
 import HelloWorld from '@/components/HelloWorld.vue'
 
-describe('Hello.vue', () => {
+describe('HelloWorld.vue', () => {
   it('renders props.msg when passed', () => {
     const msg = 'new message'
     const wrapper = shallow(HelloWorld, {

packages/@vue/cli-plugin-unit-mocha/generator/template/test/unit/HelloWorld.spec.js

@@ -2,7 +2,7 @@ import { expect } from 'chai'
 import { shallow } from '@vue/test-utils'
 import HelloWorld from '@/components/HelloWorld.vue'
 
-describe('Hello.vue', () => {
+describe('HelloWorld.vue', () => {
   it('renders props.msg when passed', () => {
     const msg = 'new message'
     const wrapper = shallow(HelloWorld, {