Fixing a typo I noticed while reading the header

Change-Id: I81951c1c22bcf92189e28c103e74264525253ca7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3333663
Auto-Submit: Joe Downing <joedow@chromium.org>
Reviewed-by: Ken Rockot <rockot@google.com>
Commit-Queue: Ken Rockot <rockot@google.com>
Cr-Commit-Position: refs/heads/main@{#951120}

diff --git a/ipc/ipc_channel.h b/ipc/ipc_channel.h
index 991d3fa3..0fb3c1e6 100644
--- a/ipc/ipc_channel.h
+++ b/ipc/ipc_channel.h

@@ -155,7 +155,7 @@
   // There are four type of modes how channels operate:
   //
   // - Server and named server: In these modes, the Channel is
-  //   responsible for settingb up the IPC object
+  //   responsible for setting up the IPC object.
   // - An "open" named server: It accepts connections from ANY client.
   //   The caller must then implement their own access-control based on the
   //   client process' user Id.