docs: fix broken anchor link in Workflow Automation Test and Debug page

[vishalranaut]

docs: fix broken reference link on Workflow Automation Test and Debug page

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Problem

The actions/workflows/test_and_debug page contains this reference link definition at the bottom of the file:

[6]: #test-expressions-and-functions

This anchor (#test-expressions-and-functions) does not exist anywhere on this page. When a user clicks the link:

"For more information, see [Test expressions and functions][6]."

...it goes nowhere.

Fix

Updated reference [6] to point to the correct Expressions page:

Before:

[6]: #test-expressions-and-functions

After:

[6]: /actions/workflows/expressions/

File changed: content/en/actions/workflows/test_and_debug.md

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Checklist

• Docs only change — no source code modified
• Verified /actions/workflows/expressions/ is the correct destination page
• Link text in the page body is unchanged
• No other lines were modified