docs: update nodejs script for formatting the documentation to be the correct npm run fmt from the package, as the npm run format does not exist

```
❯ npm run format
npm error Missing script: "format"
npm error
npm error To see a list of scripts, run:
npm error   npm run

❯ npm run
Scripts available in undefined via `npm run-script`:
  fmt
    prettier --write '.vitepress/{config,navbars,sidebars}.ts' '.vitepress/theme/**/*'
  dev
    vitepress dev
  build
    vitepress build
  preview
    vitepress preview
```

Author: chrispelzer

docs/contribute/documentation.md

@@ -50,7 +50,7 @@ npm run dev
 Format the code before committing:
 
 ```shell
-npm run format
+npm run fmt
 ```
 
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