XXE_changing_content_type.adoc: Typo fixes

Author: ElieDeBrauwer

webgoat-lessons/xxe/src/main/resources/lessonPlans/en/XXE_changing_content_type.adoc

@@ -1,6 +1,6 @@
 == Modern REST framework
 
-In modern REST frameworks the server might be able to accepts data formats that you as a developer did not think about. So this might result in JSON endpoints being vulnerable to XXE attacks.
+In modern REST frameworks the server might be able to accept data formats that you as a developer did not think about. So this might result in JSON endpoints being vulnerable to XXE attacks.
 
-Again same exercise but try to perform the same XML injection as we did in first assignment.
+Again same exercise but try to perform the same XML injection as we did in the first assignment.