Update WebRTC code version (2022-05-07T04:01:40).

Bug: None
Change-Id: I5332e8a36c357feedcfe2aa7630f85429e43ed18
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/261442
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@{#36804}
diff --git a/call/version.cc b/call/version.cc
index 9596740..1b09030 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 2022-05-06T04:02:20";
+const char* const kSourceTimestamp = "WebRTC source stamp 2022-05-07T04:01:39";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even