Update multiple webhook handlers error

[batuhannarci]

WHY are these changes introduced?

Fixes #1289

WHAT is this pull request doing?

This PR updates the error message.

Type of change

• Patch: Bug (non-breaking change which fixes an issue)
• Minor: New feature (non-breaking change which adds functionality)
• Major: Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have used yarn changeset to create a draft changelog entry (do NOT update the CHANGELOG.md file manually)
• I have added/updated tests for this change
• I have documented new APIs/updated the documentation for modified APIs (for public APIs)

[lizkenyon]

Thanks for clarifying this!
One small wording change requested!

You can add an empty changeset to get the CI to pass.

You will also need to sign the CLI.

[lizkenyon]

Hi there @batuhannarci

Looks like there are some failing tests. (Example) Once you get those passing we can merge this! Thanks again! ⭐

[batuhannarci]

Hi @lizkenyon

I think all set this time 😄

[lizkenyon]

Thank you again for your contribution!