PEP 622: Fix example in static checks

Fixes #1516

pep-0622.rst

@@ -990,10 +990,10 @@ expression with a union type::
 
   def classify(val: Union[int, Tuple[int, int], List[int]]) -> str:
       match val:
-          case [x, *other]:
-              return f"A sequence starting with {x}"
           case [x, y] if x > 0 and y > 0:
               return f"A pair of {x} and {y}"
+          case [x, *other]:
+              return f"A sequence starting with {x}"
           case int():
               return f"Some integer"
           # Type-checking error: some cases unhandled.