Revert associativity of Pattern!?

Author: rocky

mathics_scanner/data/operators.yml

@@ -4731,7 +4731,7 @@ Pattern:
   FullForm: Pattern[symb, expr]
   arity: Binary
   affix: Infix
-  associativity: right
+  associativity: "unknown"
   meaningful: true
   # comments:
 

mathics_scanner/version.py

@@ -4,4 +4,4 @@
 # well as importing into Python. That's why there is no
 # space around "=" below.
 # fmt: off
-__version__="10.0.0.dev0"  # noqa
+__version__="2.0.1.dev0"  # noqa