fix(docs): use absolute url instead of relative in navbar link (#1201)

## Description

fixes navbar logo button liinking to the outdated landing page

### Introduces a breaking change?

- [ ] Yes
- [ ] No

### Type of change

- [ ] Bug fix (change which fixes an issue)
- [ ] New feature (change which adds functionality)
- [ ] Documentation update (improves or adds clarity to existing
documentation)
- [ ] Other (chores, tests, code style improvements etc.)

### Tested on

- [ ] iOS
- [ ] Android

### Testing instructions

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Include setup details if necessary. -->

### Screenshots

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### Related issues

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### Checklist

- [ ] I have performed a self-review of my code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have updated the documentation accordingly
- [ ] My changes generate no new warnings

### Additional notes

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Author: chmjkb

docs/docusaurus.config.js

@@ -141,6 +141,8 @@ const config = {
         logo: {
           alt: 'React Native ExecuTorch',
           src: 'img/logo-hero.svg',
+          href: 'https://docs.swmansion.com/react-native-executorch/',
+          target: '_self',
         },
         items: [
           {