[mac_ai] testing: config: don't fail the test when a regression is detected

Author: kpouget

projects/mac_ai/testing/config.yaml

@@ -615,7 +615,7 @@ matbench:
       enabled: false
       enabled_on_replot: true
       # if the regression analyses fail, mark the test as failed
-      fail_test_on_regression: true
+      fail_test_on_regression: false
       notification:
         enabled: true
         title: "Mac-AI CPT"