Correct crystal build --progress step count max to 14 (#16269)

We missed increasing the count when we added the restrictions augmenter stage.
It's not always correct, but at least more often than 13.

Author: miry

src/compiler/crystal/progress_tracker.cr

@@ -1,7 +1,7 @@
 module Crystal
   class ProgressTracker
     # FIXME: This assumption is not always true
-    STAGES        = 13
+    STAGES        = 14
     STAGE_PADDING = 34
 
     property? stats = false