ci: luacheckrc - organize, add ta_update

.luacheckrc

 std = 'luajit'
 new_read_globals = {
+	'cache',
+	'event',
 	'help',
-	'quit',
+	'_hint_root_file',
 	'hostname',
-	'package_version',
-	'user',
-	'verbose',
-	'resolve',
-	'tojson',
-	'todname',
 	'map',
-	'net',
-	'cache',
 	'modules',
-	'trust_anchors',
+	'net',
+	'package_version',
+	'quit',
+	'resolve',
 	'ta_update',
+	'todname',
+	'tojson',
+	'user',
+	'verbose',
 	'worker',
-	'event',
-	'_hint_root_file',
 	-- Sandbox declarations
 	'kB',
 	'MB',
@@ -32,7 +31,6 @@ new_read_globals = {
 	'warn',
 	'log',
 	'mode',
-	'trust_anchors',
 	'reorder_RR',
 	'option',
 	'env',