[taskmanagerrulesrc] Add Rewrite Rule for Google-chrome

Google Chrome needlessly changed its window class class to Google-chrome
(was google-chrome previously) breaking our launcher mapping.

BUG: 372211
FIXED-IN: 5.8.4

Differential Revision: https://phabricator.kde.org/D3308

libtaskmanager/taskmanagerrulesrc

@@ -22,6 +22,13 @@ Identifier=DesktopEntryName
 Match=(?<=crx_)(?'match'[a-z]+)
 Target=chrome-%1-default
 
+# Google changed the class to be "Google-chrome" around version 54
+[Rewrite Rules][Google-chrome][1]
+Property=ClassName
+Identifier=DesktopEntryName
+Match=(?<=crx_)(?'match'[a-z]+)
+Target=chrome-%1-default
+
 [Rewrite Rules][chromium][1]
 Property=ClassName
 Identifier=DesktopEntryName