Bug 1452207 - Add a comment to browser/app/permissions that Data Collection Review is needed for additional hc_telemetry domains r=chutten DONTBUILD

browser/app/permissions

@@ -24,4 +24,5 @@ origin	remote-troubleshooting	1	https://input.mozilla.org
 origin	remote-troubleshooting	1	https://support.mozilla.org
 
 # Hybrid Content Telemetry - https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/collection/hybrid-content.html
+# Adding hc_telemetry permission to a new domain requires Data Collection Review: https://wiki.mozilla.org/Firefox/Data_Collection
 origin	hc_telemetry	1	https://discovery.addons.mozilla.org