chore: fix link to himepage (#5004)

Author: Scrum

packages/@vue/cli-service-global/package.json

@@ -20,7 +20,7 @@
   "bugs": {
     "url": "https://github.com/vuejs/vue-cli/issues"
   },
-  "homepage": "https://github.com/vuejs/vue-cli/tree/dev/packages/@vue/cli-build#readme",
+  "homepage": "https://github.com/vuejs/vue-cli/tree/dev/packages/@vue/cli-service-global#readme",
   "dependencies": {
     "@vue/babel-preset-app": "^4.1.1",
     "@vue/cli-plugin-babel": "^4.1.1",