Update changelog and add credit

Related to #2446

CONTRIBUTORS.md

@@ -33,6 +33,7 @@ video tutorials.
  - David Carlier
  - Arturo Castro
  - Chi-kwan Chan
+ - Victor Chernyakin
  - TheChocolateOre
  - Ali Chraghi
  - Joseph Chua

README.md

@@ -185,6 +185,7 @@ information on what to include when reporting a bug.
    fallback window decoration
  - [X11] Bugfix: Termination would segfault if the IM had been destroyed
  - [X11] Bugfix: Any IM started after initialization would not be detected
+ - [Linux] Bugfix: Joystick evdev fds remained open in forks (#2446)
  - [POSIX] Removed use of deprecated function `gettimeofday`
  - [POSIX] Bugfix: `CLOCK_MONOTONIC` was not correctly tested for or enabled
  - [WGL] Disabled the DWM swap interval hack for Windows 8 and later (#1072)