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}

logging/rtc_event_log/encoder/blob_encoding.h

@@ -43,7 +43,7 @@ namespace webrtc {
 //
 // Note that the returned std::string might have been reserved for significantly
 // more memory than it ends up using. If the caller to EncodeBlobs() intends
-// to store the result long-term, he should consider shrink_to_fit()-ing it.
+// to store the result long-term, they should consider shrink_to_fit()-ing it.
 std::string EncodeBlobs(const std::vector<std::string>& blobs);
 std::vector<absl::string_view> DecodeBlobs(absl::string_view encoded_blobs,
                                            size_t num_of_blobs);