change CustomAlerts branch to master after PR was merged

.gitmodules

@@ -21,7 +21,7 @@
 [submodule "plugins/CustomAlerts"]
     path = plugins/CustomAlerts
     url = https://github.com/piwik/plugin-CustomAlerts.git
-    branch = translation
+    branch = master
 [submodule "plugins/TasksTimetable"]
     path = plugins/TasksTimetable
     url = https://github.com/piwik/plugin-TasksTimetable.git
@@ -30,17 +30,17 @@
     path = plugins/LoginHttpAuth
     url = https://github.com/piwik/plugin-LoginHttpAuth.git
     branch = master
+[submodule "plugins/QueuedTracking"]
+    path = plugins/QueuedTracking
+    url = https://github.com/piwik/plugin-QueuedTracking.git
+    branch = master
 
 # Note: when you add a submodule that SHOULD be left in the packaged release such as the few submodules below,
 #       then you MUST add these submodules names in the SUBMODULES_PACKAGED_WITH_CORE variable in:
 #       https://github.com/piwik/piwik-package/blob/master/scripts/build-package.sh
 
-[submodule "plugins/QueuedTracking"]
-    path = plugins/QueuedTracking
-    url = https://github.com/piwik/plugin-QueuedTracking.git
-    branch = master
 
 [submodule "libs/PiwikTracker"]
     path = libs/PiwikTracker
     url = https://github.com/piwik/piwik-php-tracker.git
-    branch = master
\ No newline at end of file
+    branch = master