Add guidance on cody agent cpu utilization (#593)

<!-- Explain the changes introduced in your PR -->
This doc update adds an entry faced by customers on IntelliJ IDEs who
experience 100% CPU utilization from the Cody agent. Since no fix is out
yet, this doc update introduces a quick and easy workaround for users

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Author: airamare01

docs/cody/troubleshooting.mdx

@@ -137,3 +137,11 @@ JetBrains logs can be accessed via the **Output** panel. To access logs, you mus
 - Click Apply
 - To access the logs, go to Help - Show Log in Finder
 - Open the `idea.log` file
+
+### High CPU Usage with Cody Agent
+
+If you notice the Cody agent reaching 100% CPU utilization, try the following:
+
+1. Disable the Cody plugin.
+1. Re-enable the plugin.
+This simple action of turning the plugin off and on again can often resolve the high CPU usage issue.