fix(docs): leftovers of attribute changes from last major release

[mfranzke]

Proposed changes

Converted some leftovers of attribute changes from last major release 3.x out the changes by #4476, mainly for tooltip documentation.

partly resolves #4680 (the documentation part)

Types of changes

• Bugfix (non-breaking change that fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (improvements to existing components or architectural decisions)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Further comments

[github-actions]

🔭🐙🐈 Test this branch here: https://db-ux-design-system.github.io/core-web/review/fix-converted-leftovers

[Copilot]

Pull Request Overview

This PR fixes documentation leftovers from a previous major release by updating outdated attribute names in tooltip examples. The changes address inconsistencies where the old describedbyid attribute was still being used instead of the standard aria-describedby attribute.

• Updates tooltip documentation examples across React, Vue, and Angular frameworks
• Fixes test file to use correct attribute name
• Ensures consistency with accessibility standards by using proper ARIA attributes

Reviewed Changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated no comments.

File	Description
tooltip.spec.tsx	Updates test case to use aria-describedby instead of describedbyid
Vue.md	Fixes Vue documentation example to use correct ARIA attribute
React.md	Updates React documentation example with proper attribute name
Angular.md	Corrects Angular documentation example to use standard ARIA attribute