Update events-and-parameters.mdx

[bradenkeith]

I removed the second return from the code sample since it will never be reached.

Summary

Screenshots (optional)

Documentation checklist

• The documentation style guide has been adhered to.
• If a larger change - such as adding a new page- an issue has been opened in relation to any incorrect or out of date information that this PR fixes.
• Files which have changed name or location have been allocated redirects.

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PR Change Summary

Removed unreachable return statement from the code sample in the events-and-parameters documentation.

• Removed the second return statement from the code sample as it was unreachable.
• Updated the code sample for clarity and accuracy.

Modified Files

• src/content/docs/workflows/build/events-and-parameters.mdx

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