Mention react-native menu shortcut in README

PR #2879 <https://github.com/Genymobile/scrcpy/pull/2879>

Signed-off-by: Romain Vimont <rom@rom1v.com>

README.md

@@ -71,6 +71,12 @@ On Debian and Ubuntu:
 apt install scrcpy
 ```
 
+On Arch Linux:
+
+```
+pacman -S scrcpy
+```
+
 A [Snap] package is available: [`scrcpy`][snap-link].
 
 [snap-link]: https://snapstats.org/snaps/scrcpy
@@ -82,10 +88,6 @@ For Fedora, a [COPR] package is available: [`scrcpy`][copr-link].
 [COPR]: https://fedoraproject.org/wiki/Category:Copr
 [copr-link]: https://copr.fedorainfracloud.org/coprs/zeno/scrcpy/
 
-For Arch Linux, an [AUR] package is available: [`scrcpy`][aur-link].
-
-[AUR]: https://wiki.archlinux.org/index.php/Arch_User_Repository
-[aur-link]: https://aur.archlinux.org/packages/scrcpy/
 
 For Gentoo, an [Ebuild] is available: [`scrcpy/`][ebuild-link].
 
@@ -936,7 +938,7 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
  | Click on `HOME`                             | <kbd>MOD</kbd>+<kbd>h</kbd> \| _Middle-click_
  | Click on `BACK`                             | <kbd>MOD</kbd>+<kbd>b</kbd> \| _Right-click²_
  | Click on `APP_SWITCH`                       | <kbd>MOD</kbd>+<kbd>s</kbd> \| _4th-click³_
- | Click on `MENU` (unlock screen)             | <kbd>MOD</kbd>+<kbd>m</kbd>
+ | Click on `MENU` (unlock screen)⁴            | <kbd>MOD</kbd>+<kbd>m</kbd>
  | Click on `VOLUME_UP`                        | <kbd>MOD</kbd>+<kbd>↑</kbd> _(up)_
  | Click on `VOLUME_DOWN`                      | <kbd>MOD</kbd>+<kbd>↓</kbd> _(down)_
  | Click on `POWER`                            | <kbd>MOD</kbd>+<kbd>p</kbd>
@@ -947,9 +949,9 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
  | Expand notification panel                   | <kbd>MOD</kbd>+<kbd>n</kbd> \| _5th-click³_
  | Expand settings panel                       | <kbd>MOD</kbd>+<kbd>n</kbd>+<kbd>n</kbd> \| _Double-5th-click³_
  | Collapse panels                             | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>n</kbd>
- | Copy to clipboard⁴                          | <kbd>MOD</kbd>+<kbd>c</kbd>
+ | Copy to clipboard⁵                          | <kbd>MOD</kbd>+<kbd>c</kbd>
- | Cut to clipboard⁴                           | <kbd>MOD</kbd>+<kbd>x</kbd>
+ | Cut to clipboard⁵                           | <kbd>MOD</kbd>+<kbd>x</kbd>
- | Synchronize clipboards and paste⁴           | <kbd>MOD</kbd>+<kbd>v</kbd>
+ | Synchronize clipboards and paste⁵           | <kbd>MOD</kbd>+<kbd>v</kbd>
  | Inject computer clipboard text              | <kbd>MOD</kbd>+<kbd>Shift</kbd>+<kbd>v</kbd>
  | Enable/disable FPS counter (on stdout)      | <kbd>MOD</kbd>+<kbd>i</kbd>
  | Pinch-to-zoom                               | <kbd>Ctrl</kbd>+_click-and-move_
@@ -959,7 +961,8 @@ _<kbd>[Super]</kbd> is typically the <kbd>Windows</kbd> or <kbd>Cmd</kbd> key._
 _¹Double-click on black borders to remove them._  
 _²Right-click turns the screen on if it was off, presses BACK otherwise._  
 _³4th and 5th mouse buttons, if your mouse has them._  
-_⁴Only on Android >= 7._
+_⁴For react-native apps in development, `MENU` triggers development menu._  
+_⁵Only on Android >= 7._
 
 Shortcuts with repeated keys are executted by releasing and pressing the key a
 second time. For example, to execute "Expand settings panel":