Merge pull request #1330 from andriisoldatenko/fix-2-times-typo

Fixed 2 times typo

Author: Ron

versions/3.0.1.md

@@ -2367,7 +2367,7 @@ While composition offers model extensibility, it does not imply a hierarchy betw
 To support polymorphism, the OpenAPI Specification adds the `discriminator` field.
 When used, the `discriminator` will be the name of the property that decides which schema definition validates the structure of the model.
 As such, the `discriminator` field MUST be a required field.
-There are are two ways to define the value of a discriminator for an inheriting instance.
+There are two ways to define the value of a discriminator for an inheriting instance.
 - Use the schema name.
 - Override the schema name by overriding the property with a new value. If a new value exists, this takes precedence over the schema name.
 As such, inline schema definitions, which do not have a given id, *cannot* be used in polymorphism.