Update WebRTC code version (2022-09-22T04:02:49).

Bug: None
Change-Id: I53e9f835f629d7065410c02d70f8defcaee104b9
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/276324
Commit-Queue: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Bot-Commit: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#38167}
diff --git a/call/version.cc b/call/version.cc
index 32c3dc6..7b39b6b 100644
--- a/call/version.cc
+++ b/call/version.cc
@@ -13,7 +13,7 @@
 namespace webrtc {
 
 // The timestamp is always in UTC.
-const char* const kSourceTimestamp = "WebRTC source stamp 2022-09-20T04:12:52";
+const char* const kSourceTimestamp = "WebRTC source stamp 2022-09-22T04:02:49";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even