sdp munging: fix sctp-port uma id collision

Bug: webrtc:414284082
Change-Id: Icc12b2ae293db857efe61ec9f8f0a4020046a0a2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/463780
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#47407}

api/uma_metrics.h

diff --git a/api/uma_metrics.h b/api/uma_metrics.h
index 503f8ab..daecfe8 100644
--- a/api/uma_metrics.h
+++ b/api/uma_metrics.h
@@ -237,7 +237,7 @@
   // DataChannel-related munging.
   kDataChannelSctpInit = 100,
   kDataChannelMaxMessageSize = 101,
-  kDataChannelSctpPort = 101,
+  kDataChannelSctpPort = 102,
   kMaxValue,
 };