doc/go1.19: Linux race detector now requires glibc 2.17

Fixes #53522

Change-Id: Ibed838d358a733d26a6c3d89446d7fadb1012961
Reviewed-on: https://go-review.googlesource.com/c/go/+/413876
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
diff --git a/doc/go1.19.html b/doc/go1.19.html
index b323b0d..53c11bd 100644
--- a/doc/go1.19.html
+++ b/doc/go1.19.html
@@ -807,6 +807,7 @@
       Compared to v2, it is now typically 1.5x to 2x faster, uses half
       as much memory, and it supports an unlimited number of
       goroutines.
+      On Linux, the race detector now requires at least glibc version 2.17.
     </p>
 
     <p><!-- CL 336549 -->