Fix typo in abseil-in-webrtc.md.

NOTRY=True  # ios bots failing

Bug: None
Change-Id: Id3f3ea98be9cfef22c3431ae30cc15e282423ee2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/162521
Commit-Queue: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30110}
diff --git a/abseil-in-webrtc.md b/abseil-in-webrtc.md
index cf8f97d..0541d3c 100644
--- a/abseil-in-webrtc.md
+++ b/abseil-in-webrtc.md
@@ -40,7 +40,7 @@
 one. To make `absl::Mutex` available, we would need to nicely ask the
 Abseil team to remove that initializer (like they already did for a
 spinlock initializer). Additionally, `absl::Mutex` handles time in a
-way that may not be compaible with the rest of WebRTC.
+way that may not be compatible with the rest of WebRTC.
 
 ### `absl::Span`