Update WebRTC code version (2022-09-18T04:03:12).

Bug: None
Change-Id: Ib9725ab2ca1c10d36b61b25a71f97668e0095ddb
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/275826
Bot-Commit: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Commit-Queue: webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com <webrtc-version-updater@webrtc-ci.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#38110}
diff --git a/call/version.cc b/call/version.cc
index a72a9605..ef1de51 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 2022-09-17T04:02:51";
+const char* const kSourceTimestamp = "WebRTC source stamp 2022-09-18T04:03:12";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even