chore(context-pad): document as non-alpha feature

[philippfromme]

Description

Changes the context pad documentation from alpha to non-alpha since it's now enabled by default and not considered an alpha feature anymore.

Closes #3992

When should this change go live?

• This is a bug fix, security concern, or something that needs urgent release support.
• This is already available but undocumented and should be released within a week.
• This on a specific schedule and the assignee will coordinate a release with the DevEx team. (apply hold label or convert to draft PR)
• This is part of a scheduled alpha or minor. (apply alpha or minor label)
• There is no urgency with this change and can be released at any time.

PR Checklist

• My changes are for an already released minor and are in /versioned_docs directory.
• My changes are for the next minor and are in /docs directory (aka /next/).

• My changes require an Engineering review, and I've assigned the Engineering DRI or delegate.
• My changes require a technical writer review, and I've assigned @camunda/tech-writers as a reviewer.

[akeller]

@philippfromme, you'll need a redirect here to get the build ✅. Is this ready for a review (or assistance)?

[philippfromme]

@philippfromme, you'll need a redirect here to get the build ✅. Is this ready for a review (or assistance)?

Thanks for the hint. I'll try to fix it.

[christinaausley]

@philippfromme Just let me know if I can help 😄

[philippfromme]

@philippfromme Just let me know if I can help 😄

I added a redirect but unfortunately it's still failing. 😢

[christinaausley]

@philippfromme You were close -- just made a minor tweak.

[christinaausley]

@philippfromme Is this also ready for review?

[philippfromme]

This is ready for review.

[christinaausley]

Nice work on this!

[philippfromme]

@christinaausley Can we go ahead and merge this?