Update README for 2.9.2

Author: zorgiepoo

CHANGELOG

@@ -1,3 +1,11 @@
+# 2.9.2
+
+* Show hidden window title in update window for accessibility (#2871) (Zorg)
+* Polish and update Spanish translations to be gender neutral (#2874, #2875) (Emilio P Egido)
+* Guard against NULL CFRelease() on failure condition in fallback path (#2867) (Zorg)
+* Guard against symlinks when applying delta update files (fe7b718) (Zorg, fg0x0)
+* Enforce connection to installer to be validated before receiving appcast item data (#2876) (Zorg, fg0x0)
+
 # 2.9.1
 
 * Fix potential crash due to race condition within clearDownloadedUpdate (#2863) (Julian Pscheid)