TST: Raise the final du passthrough size on CI

Author: kernc

smoke-test.sh

@@ -90,7 +90,7 @@ disk_usage
 myba gc
 disk_usage
 # foo + .myba + remote + remote2 + restore + overhead
-test "$(du -sm "$HOME" | cut -f1)" -le 6
+test "$(du -sk "$HOME" | cut -f1)" -lt 6200
 
 myba log