Update Jira integration form microcopy

What does this MR do and why?

Describe in detail what your merge request does and why.

This MR updates the microcopy on the Jira integration form based on @ashrafkhamis suggestion found in: #377371[Example_on_integration.png]

Context

Screenshots or screen recordings

Screenshots are required for UI changes, and strongly recommended for all other merge requests.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

1. Open the GDK or Gitpod
2. Open a project and navigate to Settings > Integrations and click Jira (http://gdk.test:3000/flightjs/Flight/-/settings/integrations/jira/edit)
3. See updated help text on form

Before	After

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.