Fixed documentation typo

Author: olaf-otto

core/src/test/java/io/neba/core/resourcemodels/mapping/FieldValueMappingCallbackTest.java

@@ -1378,7 +1378,7 @@ public void testNullNonCollectionValuesAreNullWhenInvokingFieldMappers() {
     /**
      * A {@link AnnotatedFieldMapper} implementation must take
      * care to return an assignment-compatible value as a mapping result. However,
-     * there are no enforce this at compile time. This test verifies that a suitable exception
+     * there is no way to enforce this at compile time. This test verifies that a suitable exception
      * is thrown in case a field mapper returns an incompatible value at runtime.
      */
     @Test