[newlib-cygwin] Cygwin: Document several fixes for signal handling in release note

[Takashi Yano]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=cfadd852aa5787eb29403efc75bfa637028bfd40

commit cfadd852aa5787eb29403efc75bfa637028bfd40
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Tue Nov 26 13:56:51 2024 +0900

    Cygwin: Document several fixes for signal handling in release note

Diff:
---
 winsup/cygwin/release/3.5.5 | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/winsup/cygwin/release/3.5.5 b/winsup/cygwin/release/3.5.5
index 7eece3bbd..e99739241 100644
--- a/winsup/cygwin/release/3.5.5
+++ b/winsup/cygwin/release/3.5.5
@@ -57,3 +57,7 @@ Fixes:
 
 - Fix losing signals during setjmp/longjmp.
   Addresses: https://cygwin.com/pipermail/cygwin/2024-November/256808.html
+
+- Fix several problems triggered when a lot of SIGSTOP/SIGCONT signals
+  are received rapidly.
+  Addresses: https://cygwin.com/pipermail/cygwin/2024-November/256744.html