Cygwin: Revise release note

Author: jon-turney

winsup/cygwin/release/3.6.2

@@ -1,3 +1,9 @@
+Changes:
+--------
+
+- Update <search.h> to align with POSIX.1-2024, adding the posix_tnode type
+and declaring functions using it.
+
 Fixes:
 ------
 
@@ -11,16 +17,19 @@ Fixes:
 - Fix the console states after the console is closed.
   Addresses: https://cygwin.com/pipermail/cygwin/2025-April/257909.html
 
+- Fix compilation of sys/unistd.h with std=c90
+  Addresses: https://sourceware.org/pipermail/cygwin-patches/2025q2/013644.html
+
 - Fix setting DOS attributes on devices.
-  Addresse: https://cygwin.com/pipermail/cygwin/2025-April/257940.html
+  Addresses: https://cygwin.com/pipermail/cygwin/2025-April/257940.html
 
 - Fix cygwin_conv_path writing to 'to' pointer before size is checked.
   Addresses: https://cygwin.com/pipermail/cygwin/2025-April/258068.html
 
 - Fix handle leak occured when the signal handler calls longjmp().
   https://sourceware.org/pipermail/cygwin/2025-March/257726.html
 
-- Fix conserver-config error.
+- Fix cygserver-config error.
   https://cygwin.com/pipermail/cygwin/2025-April/258086.html
 
 - Fix deadlock for opening both side of a fifo in a process.