Update WebRTC code version (2023-03-29T04:08:24).

Bug: None
Change-Id: I7e2bd6cfcb1679a8987ac0c02a7d24a2bc37ef45
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/299400
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@{#39709}

call/version.cc

diff --git a/call/version.cc b/call/version.cc
index f0048a6..0dac14e 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 2023-03-28T04:03:45";
+const char* const kSourceTimestamp = "WebRTC source stamp 2023-03-29T04:08:24";
 
 void LoadWebRTCVersionInRegister() {
   // Using volatile to instruct the compiler to not optimize `p` away even