patch 9.0.0574: timer garbage collect test hangs on Mac M1

Problem:    Timer garbage collect test hangs on Mac M1.
Solution:   Properly check for Mac M1 and skip the test.
diff --git a/src/version.c b/src/version.c
index 4428687..5057877 100644
--- a/src/version.c
+++ b/src/version.c
@@ -700,6 +700,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    574,
+/**/
     573,
 /**/
     572,