Updated component to Chromecast as per comment in CL:...

Updated component to Chromecast as per comment in CL: https://chromium-review.googlesource.com/c/chromium/src/+/1700938

TBR=mfoltz@chromium.org
NOPRESUBMIT=true

Bug: 977050
Change-Id: Ib3b13bae8ccd71f301f7817bb0978fb8e1d2c32f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1716031
Commit-Queue: Eric Foo <efoo@chromium.org>
Reviewed-by: Eric Foo <efoo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#680247}

components/cast_certificate/OWNERS

 file://chromecast/OWNERS
 dougsteed@chromium.org
-# COMPONENT: Internals>Network>Certificate
+
+# COMPONENT: Chromecast