Update the component name for Previews bugs

Bug: 869447
Change-Id: I64c205b5ffb2126382c04f5aeefe1cb88010744a
Reviewed-on: https://chromium-review.googlesource.com/1156993Reviewed-by: Doug Arnett <dougarnett@chromium.org>
Reviewed-by: Ryan Sturm <ryansturm@chromium.org>
Commit-Queue: Tarun Bansal <tbansal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#580223}

chrome/browser/resources/interventions_internals/OWNERS

 file://components/previews/OWNERS
 
-# COMPONENT: UI>Browser>Previews
+# COMPONENT: Blink>Previews

chrome/browser/ui/webui/interventions_internals/OWNERS

@@ -4,4 +4,4 @@ tbansal@chromium.org
 per-file *.mojom=set noparent
 per-file *.mojom=file://ipc/SECURITY_OWNERS
 
-# COMPONENT: UI>Browser>Previews
+# COMPONENT: Blink>Previews

components/previews/OWNERS

 file://components/data_reduction_proxy/OWNERS
 
-# COMPONENT: UI>Browser>Previews
+# COMPONENT: Blink>Previews
\ No newline at end of file