docs: improve sidebar items custom props docs

[slorber]

sidebar_custom_props is of type object and not string

better example for the customProps doc

little bug in ApiTable when clicking on a link inside the table (we should navigate to the link and not to the table row anchor.

• https://deploy-preview-8888--docusaurus-2.netlify.app/docs/api/plugins/@docusaurus/plugin-content-docs/#sidebar_custom_props
• https://deploy-preview-8888--docusaurus-2.netlify.app/docs/sidebar/#passing-custom-props

[netlify]

✅ [V2]

Name	Link
🔨 Latest commit	3b7cdb1
🔍 Latest deploy log	https://app.netlify.com/sites/docusaurus-2/deploys/6437d4fc2d0e1600086d4f5f
😎 Deploy Preview	https://deploy-preview-8888--docusaurus-2.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site settings.

[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟢 90	🟢 97	🟢 92	🟢 100	🟢 90	Report
/docs/installation	🟠 79	🟢 100	🟢 92	🟢 100	🟢 90	Report

[github-actions]

Size Change: 0 B

Total Size: 1.01 MB

ℹ️ View Unchanged

Filename	Size
website/.docusaurus/globalData.json	101 kB
website/build/assets/css/styles.********.css	113 kB
website/build/assets/js/main.********.js	752 kB
website/build/index.html	41.2 kB

_{compressed-size-action}