[binutils-gdb/gdb-12-branch] Update gdb/NEWS to say "in GDB 12" instead of "since GDB 11"

[Joel Brobecker]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=fc8b2d4b5d0b00751bc040b668b7cff582c6b6bb

commit fc8b2d4b5d0b00751bc040b668b7cff582c6b6bb
Author: Joel Brobecker <brobecker@adacore.com>
Date:   Sun Mar 20 09:25:52 2022 +0400

    Update gdb/NEWS to say "in GDB 12" instead of "since GDB 11"

Diff:
---
 gdb/NEWS | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gdb/NEWS b/gdb/NEWS
index c609da7e6cf..501ace1872e 100644
--- a/gdb/NEWS
+++ b/gdb/NEWS
@@ -1,7 +1,7 @@
 		What has changed in GDB?
 	     (Organized release by release)
 
-*** Changes since GDB 11
+*** Changes in GDB 12
 
 * DBX mode is deprecated, and will be removed in GDB 13