Update installation.md

I believe the current version of Docusaurus requires node 16.  With 14 I get:
```
import {program} from 'commander';
        ^^^^^^^
SyntaxError: The requested module 'commander' does not provide an export named 'program'
    at ModuleJob._instantiate (internal/modules/esm/module_job.js:92:21)
    at async ModuleJob.run (internal/modules/esm/module_job.js:107:20)
    at async Loader.import (internal/modules/esm/loader.js:179:24)
```

website/docs/installation.md

@@ -20,7 +20,7 @@ Use **[docusaurus.new](https://docusaurus.new)** to test Docusaurus immediately
 
 ## Requirements {#requirements}
 
-- [Node.js](https://nodejs.org/en/download/) version >= 14 or above (which can be checked by running `node -v`). You can use [nvm](https://github.com/nvm-sh/nvm) for managing multiple Node versions on a single machine installed.
+- [Node.js](https://nodejs.org/en/download/) version >= 16 or above (which can be checked by running `node -v`). You can use [nvm](https://github.com/nvm-sh/nvm) for managing multiple Node versions on a single machine installed.
   - When installing Node.js, you are recommended to check all checkboxes related to dependencies.
 
 ## Scaffold project website {#scaffold-project-website}