fix ArbitrarySchema

Author: frantuma

modules/swagger-models/src/main/java/io/swagger/v3/oas/models/media/ArbitrarySchema.java

@@ -3,7 +3,7 @@
 import java.util.Objects;
 
 /**
- * ObjectSchema
+ * ArbitrarySchema
  */
 
 public class ArbitrarySchema extends Schema<Object> {
@@ -51,7 +51,7 @@ public int hashCode() {
     @Override
     public String toString() {
         StringBuilder sb = new StringBuilder();
-        sb.append("class ObjectSchema {\n");
+        sb.append("class ArbitrarySchema {\n");
         sb.append("    ").append(toIndentedString(super.toString())).append("\n");
         sb.append("}");
         return sb.toString();