[Accessibility]: Non-code file view: File actions menu not read out to screen readers

Created by: umpox

Audit type

Screen reader navigation

User journey audit issue

https://github.com/sourcegraph/sourcegraph/issues/34432

Problem description

Screen readers cannot understand what this button does

Expected behavior

Should have a label that describes usage

Additional details

No response

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Owner

This issue will be fixed by my team, I have assigned a relevant member to it, or I will do so in the near future.