Document fake ID

Signed-off-by: Patrice Chalin <[email protected]>

Author: chalin

config.toml

@@ -117,7 +117,7 @@ anchor = "smart"
 
 [services]
 [services.googleAnalytics]
-# Comment out the next line to disable GA tracking. Also disables the feature described in [params.ui.feedback].
+# Fake ID in support of [params.ui.feedback]. The real GA ID is set in the Netlify config.
 id = "UA-00000000-0"
 
 [params]