[WebOTP] Update owners file with the up-to-date component name

Bug: None
Change-Id: I3557fcc552ca4e5505226dd20f978949bbae0de5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363491Reviewed-by: Bo <boliu@chromium.org>
Commit-Queue: Yi Gu <yigu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#799442}

content/browser/sms/OWNERS

@@ -4,5 +4,5 @@ goto@chromium.org
 # Secondary
 reillyg@chromium.org
 
-# COMPONENT: Blink>SMS
+# COMPONENT: Blink>WebOTP
 # TEAM: fugu-dev@chromium.org