fix typo in diagnostic message

[stef7]

Summary

Addresses this issue:

• 📎 Typo in diagnostic message #4579

There seems to be a typo on this line.

  × Fixes applied to the file, but there a still diagnostics to address.

It seems to be wanting to say "there are still diagnostics to address".

Test Plan

Changelog

• [-] The PR requires a changelog line

Documentation

• [-] The PR requires documentation
• [-] I will create a new PR to update the documentation

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