Fix tabs typing

[Mil4n0r]

Checklist
(Check off all the items before submitting)

• Build process is done without errors. All tests pass in the /lib directory.
• Self-reviewed the code before submitting.
• Meets accessibility standards.
• Added/updated documentation to /website as needed.
• Added/updated tests as needed.

Tab's tabId prop was showing as required while in the typing it was not. Now the documentation correctly explains that either tabId or label have to be set for the component to work and the typing is restricted so that at least one of both have to be set while using TS.