Addition of missing step in Jira GPT Action entry

[rupert-openai]

Summary

Minor change to ensure the user reaches the client/secret screen when following the Jira GPT Action entry

Motivation

Ensures fewer users get stuck by spelling out the need for a placeholder callback URL.

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[rupert-openai]

Minor change based on customer feedback @aaronwilkowitz-openai @maxreid-openai

[aaronwilkowitz-openai]

Looks good, thanks!