Improved Clarity for Accessibility API Permission Instructions (#1575)

* Update Accessibility API permission instrucitons for MacOS 12 and Higher.

* Update README -> Accessibility Instructions Updated

README.md

@@ -29,9 +29,11 @@ Note: that Amethyst now is only supported on macOS 10.15+.
 Using Amethyst
 ==============
 
-Amethyst must be given permissions to use the accessibility APIs under the Privacy tab of the Security & Privacy preferences pane as shown below.
+Amethyst must be given permissions to use the accessibility APIs in the Privacy & Security tab, Privacy -> Accessibilty.
 
-![Accessibility permissions](https://ianyh.com/amethyst/images/accessibility-window.png)
+<p align="center">
+  <img style="text-align: center; border-radius:4px;" width="500px" src="docs/images/accessibility-permission.png" alt="Give Accessibility permission to Amethyst under Privicay and Security." />
+</p>
 
 **_Important note_**: You will probably want to disable `Automatically rearrange Spaces based on most recent use` (found under Mission Control in System Preferences). This setting is enabled by default, and will cause your Spaces to swap places based on use. This makes keyboard navigation between Spaces unpredictable.