Add Xcode Instrument images to troubleshooting doc (#52768)

Merge first: https://github.com/zed-industries/zed.dev/pull/1861

Self-Review Checklist:

- [x] I've reviewed my own diff for quality, security, and reliability
- [x] Unsafe blocks (if any) have justifying comments
- [x] The content is consistent with the [UI/UX
checklist](https://github.com/zed-industries/zed/blob/main/CONTRIBUTING.md#uiux-checklist)
- [x] Tests cover the new/changed behavior
- [x] Performance impact has been considered and is acceptable

Release Notes:

- N/A

docs/src/troubleshooting.md

@@ -45,10 +45,13 @@ Xcode Instruments (which comes bundled with your [Xcode](https://apps.apple.com/
 
 1. With Zed running, open Instruments
 1. Select `Time Profiler` as the profiling template
+   ![Instruments template picker with Time Profiler selected](https://images.zed.dev/troubleshooting/instruments-template-picker.webp)
 1. In the `Time Profiler` configuration, set the target to the running Zed process
 1. Start recording
-1. If the performance issue occurs when performing a specific action in Zed, perform that action now
+   ![Time Profiler configuration showing the target dropdown and record button](https://images.zed.dev/troubleshooting/instruments-target-and-record.webp)
+1. Perform the action in Zed that causes performance issues
 1. Stop recording
+   ![A completed Time Profiler recording in Instruments](https://images.zed.dev/troubleshooting/instruments-recording.webp)
 1. Save the trace file
 1. Compress the trace file into a zip archive
 1. File a [GitHub issue](https://github.com/zed-industries/zed/issues/new/choose) with the trace zip attached