change wording for disable spotlight shortcut (and how to get it back if you change your mind)

Nobody has claimed this yet.

Hello thank you for doing this. Very happy to that save dialogues will be expanded by default!

One suggestion:

replace
```
# Hide Spotlight tray-icon (and subsequent helper)
#sudo chmod 600 /System/Library/CoreServices/Search.bundle/Contents/MacOS/Search
```
with
```
# Hide Spotlight tray-icon and disable ⌘-space keyboard shortcut.
#sudo chmod 600 /System/Library/CoreServices/Search.bundle/Contents/MacOS/Search
```
because
- this more accurately describes the total effect
- spotlight itself still available by other means, it is not disabled rather less convenient

**how to get spotlight back**

And in case anyone ever comes looking for it, [here is a method](https://www.techradar.com/how-to/computing/apple/terminal-101-remove-spotlight-from-os-x-menubar-1305615) to reverse it

```
killall SystemUIServer
sudo chmod 755 /System/Library/CoreServices/Search.bundle/Contents/MacOS/Search
killall SystemUIServer
```

Search the repository for the exact “Hide Spotlight tray-icon” comment and inspect the surrounding macOS configuration. Update the wording to mention the ⌘-Space shortcut and preserve the documented commands for restoring Spotlight; review the diff to confirm the change is limited to this documentation.

Written by the indexing model from the issue text.