docs: fix typo in plugin-dev.md (#3773) [ci skip]

Author: CodesOfRa

docs/dev-guide/plugin-dev.md

@@ -18,7 +18,7 @@ A CLI plugin is an npm package that can add additional features to the project u
 Don't overuse vue-cli plugins! If you want just to include a certain dependency, e.g. [Lodash](https://lodash.com/) - it's easier to do it manually with npm than create a specific plugin only to do so.
 :::
 
-CLI Plugin should always contain a [Service Plugin](#service-plugin) as its main export, and can optionally contain a [Generator](#generator), a [Prompt File](#prompts) and a [Vue UI integration](#ui-integrtion).
+CLI Plugin should always contain a [Service Plugin](#service-plugin) as its main export, and can optionally contain a [Generator](#generator), a [Prompt File](#prompts) and a [Vue UI integration](#ui-integration).
 
 As an npm package, CLI plugin must have a `package.json` file. It's also recommended to have a plugin description in `README.md` to help others find your plugin on npm.