Search and replace gendered terms according to style guide:
https://chromium.googlesource.com/chromium/src/+/master/styleguide/inclusive_code.md#tools

Not changin the transcipt in
resources/audio_processing/conversational_speech/README.md

BUG=webrtc:11680

Change-Id: I36af34e4a4e0ec6161093c0045b7bbe1dbe4eb45
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/177016
Reviewed-by: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#31514}
diff --git a/rtc_base/checks.h b/rtc_base/checks.h
index 2fde3f6..61c074a 100644
--- a/rtc_base/checks.h
+++ b/rtc_base/checks.h
@@ -69,7 +69,7 @@
 //   the reason that it's better to terminate might simply be that the error
 //   handling code isn't in place yet; in production, the reason might be that
 //   the author of the code truly believes that x will always be true, but that
-//   she recognizes that if she is wrong, abrupt and unpleasant process
+//   they recognizes that if they are wrong, abrupt and unpleasant process
 //   termination is still better than carrying on with the assumption violated.
 //
 //   RTC_CHECK always evaluates its argument, so it's OK for x to have side