Add step to disable ad-blocker when installing JIRA (#5941)

There's a note in the troubleshooting section but it is too common for customers to use ad-blockers and not think that they need to look in the troubleshooting section.

Co-authored-by: Isabel <[email protected]>

Author: armenzg

src/docs/product/integrations/issue-tracking/jira/index.mdx

@@ -28,9 +28,11 @@ Sentry owner, manager, or admin permissions, and Jira admin permissions are requ
 
 2. Install the Sentry app through the [Jira marketplace](https://marketplace.atlassian.com/apps/1219432/sentry-for-jira?hosting=cloud&tab=overview).
 
-3. Select which Sentry organizations you’d like to use with Jira, and **Save Settings**.
+3. If you have an ad-blocker enabled, disable it now or you won't be able to complete step number 4.
 
-4. In Sentry, you’ll see a new Jira instance appear on the Integrations page.
+4. Select which Sentry organizations you’d like to use with Jira. Then click the presented link to return to Sentry.
+
+5. In Sentry, you’ll see a new Jira instance appear on the Integrations page.
 
    ![Jira integration directory](jira-install.png)