Update button label from "Add new note" to "Add new reply"

[karthick-murugan]

What?

Closes #73187

This PR updates the text label of the "Add new note" button to "Add new reply" for improved clarity and accessibility.

Why?

Previously, the label “Add new note” could be misinterpreted as an action to create a new note on a different block, rather than replying to the existing note thread.

How?

Testing Instructions

1. Insert a block and add a note to it.
2. Focus on the note using the Tab key.
3. Press Tab again to focus the button.
4. Confirm that the button now reads “Add new reply” instead of “Add new note.”
5. Add a reply and ensure the behavior remains unchanged.
6. Run E2E tests to confirm all related tests pass successfully.

Video

REC-20251112142209.mp4

[github-actions]

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Co-authored-by: karthick-murugan <[email protected]>
Co-authored-by: Mamaduka <[email protected]>
Co-authored-by: Dhruval-678 <[email protected]>
Co-authored-by: t-hamano <[email protected]>
Co-authored-by: jeffpaul <[email protected]>

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[Dhruval-678]

== Test Report
=== Description
This report validates whether the indicated patch works as expected IN PLAYGROUND

Patch tested: #73189

=== Environment

• WordPress: 6.8.3
• PHP: 8.3.27-dev
• Server: PHP.wasm
• Database: WP_SQLite_Driver (Server: 8.0.38 / Client: 3.40.1)
• Browser: Chrome 142.0.0.0
• OS: Linux
• Theme: Twenty Twenty-Five 1.3
• MU Plugins: None activated
• Plugins:
  • Gutenberg 22.0.0
  • Test Reports 1.2.1

=== Actual Results

1. ✅ Issue resolved with patch.

[Dhruval-678]

Notes.button.Text.mp4

[Mamaduka]

Thanks, @karthick-murugan!

@adamsilverstein, @t-hamano, if we get a green light for #73173, the we can also backport this change.

[t-hamano]

@Mamaduka, I am concerned about whether the strings can be changed after the RC1 release. See also: #73173 (review)

[Mamaduka]

@t-hamano, usually they can't be changed in RCs, at least that's my understanding. But I've seens some exception, not sure if this qualifies, though.

[t-hamano]

@Mamaduka, since the Notes is a new feature, the rules might be relaxed a bit. Do we check with tech leads or the Polyglot team?

[Mamaduka]

@t-hamano, sounds good. Let's check with the leads; the release channel should be a good place for it.

[jeffpaul]

FYI looks like some approval to proceed with this string change: https://wordpress.slack.com/archives/C08MVR1MU2K/p1762953559123909

[github-actions]

I just cherry-picked this PR to the wp/6.9 branch to get it included in the next release: 10a5e6d

[priethor]

Thanks for double-checking the string change post RC!