Bug 1425251 - update comment for aboutdebugging legacy extension warning;r=flod

MozReview-Commit-ID: GwHtS5OONAQ

--HG--
extra : rebase_source : 17d2e4be1891d4c20b81495a371da6a1546f3564

devtools/client/locales/en-US/aboutdebugging.properties

@@ -110,7 +110,7 @@ temporaryID.learnMore = Learn more
 # This string is displayed as a warning message when loading a temporary legacy extension.
 legacyExtensionWarning = This is a legacy extension, be aware that these are no longer fully supported.  Please read the linked documentation and then proceed with caution.
 
-# LOCALIZATION NOTE (temporaryID.learnMore):
+# LOCALIZATION NOTE (legacyExtensionWarning.learnMore):
 # This string is displayed as a link next to the legacyExtensionWarning message and leads
 # the user to https://wiki.mozilla.org/Add-ons/Future_of_Bootstrap.
 legacyExtensionWarning.learnMore = Learn more