[newlib-cygwin] Update release note 3.6.10

[Takashi Yano]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4e642b1107bd23995799136f0760e922ea7006a0

commit 4e642b1107bd23995799136f0760e922ea7006a0
Author: Takashi Yano <takashi.yano@nifty.ne.jp>
Date:   Thu Jul 9 21:30:35 2026 +0900

    Update release note 3.6.10

Diff:
---
 winsup/cygwin/release/3.6.10 | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/winsup/cygwin/release/3.6.10 b/winsup/cygwin/release/3.6.10
index 3f4b25abf..825ed3a62 100644
--- a/winsup/cygwin/release/3.6.10
+++ b/winsup/cygwin/release/3.6.10
@@ -24,3 +24,9 @@ Fixes:
 - Fix NOFLSH behaviour in console a bit.
 
 - Fix typeahead input in console for bash.
+
+- Fix a pty race issue at startup of cygwin and non-cygwin processes
+  where the different pipe mode (nat or cyg) is required.
+
+- Fix non-cygwin inferior crash in gdb when it is launched repeatedly
+  in a pty.