Update WebRTC code version (2022-12-14T04:03:07).

Bug: None
Change-Id: I5ac9f7dab98c3017a70e176a02e09d6c7756067b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/287982
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@{#38885}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index 3ff4dbf..4b2b9cc 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 2022-12-11T04:03:20";
+const char* const kSourceTimestamp = "WebRTC source stamp 2022-12-14T04:03:07";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even