message: docs(website): remove trailing punctuation from headings
diff: ### Installation and Usage
  -#### [Yarn](https://yarnpkg.com/):
  +#### [Yarn](https://yarnpkg.com/)
  ```bash
  yarn add rome
  yarn rome init
  ```
  -#### [npm/npx](https://www.npmjs.com/):
  +#### [npm/npx](https://www.npmjs.com/)
  ```bash
  npx rome init
  