fix link

docs/modules/ROOT/pages/jme3/advanced/walking_character.adoc

@@ -4,7 +4,7 @@
 :keywords: documentation, physics, input, animation, character, NPC, collision
 
 
-In the xref:tutorial:beginner/hello_collision.adoc[Hello Collision] tutorial and the link:https://github.com/jMonkeyEngine/jmonkeyengine/blob/master/jme3-examples/src/main/java/jme3test/bullet/TestQ3.java[TestQ3.java] code sample you have seen how to create collidable landscapes and walk around in a first-person perspective. The first-person camera is enclosed by a collision shape and is steered by the BetterCharacterControl.
+In the xref:tutorials:beginner/hello_collision.adoc[Hello Collision] tutorial and the link:https://github.com/jMonkeyEngine/jmonkeyengine/blob/master/jme3-examples/src/main/java/jme3test/bullet/TestQ3.java[TestQ3.java] code sample you have seen how to create collidable landscapes and walk around in a first-person perspective. The first-person camera is enclosed by a collision shape and is steered by the BetterCharacterControl.
 
 Other games however require a third-person perspective of the character: In these cases you use a CharacterControl on a Spatial. This example also shows how to set up custom navigation controls, so you can press WASD to make the third-person character walk; and how to implement dragging the mouse to rotate.