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}

modules/rtp_rtcp/source/rtcp_transceiver_config.h

@@ -28,8 +28,8 @@ class MediaReceiverRtcpObserver {
  public:
   virtual ~MediaReceiverRtcpObserver() = default;
 
-  // All message handlers have default empty implementation. This way user needs
-  // to implement only those she is interested in.
+  // All message handlers have default empty implementation. This way users only
+  // need to implement the ones they are interested in.
   virtual void OnSenderReport(uint32_t sender_ssrc,
                               NtpTime ntp_time,
                               uint32_t rtp_time) {}