fix: Channel Name Not Displayed in Leave Confirmation Dialog

[Ansh-dS]

Proposed changes (including videos or screenshots)

The %s placeholder is getting replaced with the actual group/channel name in the warning message.

Screen.Recording.2025-02-21.123100.mp4

Issue(s)

#35289

Steps to test or reproduce

1. Create a Group, Channel, or Team.
2. Locate the newly created group/channel in the left pane under Omnichannel.
3. Click on the three-dot menu next to the group/channel.
4. Select "Leave" from the dropdown.

[dionisio-bot]

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