fix typo

Author: CoTinker

mlir/include/mlir/IR/OperationSupport.h

@@ -248,7 +248,7 @@ class OperationName {
   ///
   ///  1. They can leave the operation alone and without changing the IR, and
   ///     return failure.
-  ///  2. They can mutate the operation in-place, without changing anything
+  ///  2. They can mutate the operation in place, without changing anything
   ///     else in the IR. In this case, return success.
   ///  3. They can return a list of existing values that can be used instead
   ///     of the operation. In this case, fill in the results list and return