docs(website): remove trailing punctuation from headings
MODIFY
website/src/_includes/docs/getting-started.md
website/src/_includes/docs/getting-started.md
### 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

docs(website): remove trailing punctuation from headings (#1641)