fix links

docs/modules/ROOT/pages/jme3/features.adoc

@@ -41,7 +41,7 @@ See also: xref:jme3/requirements.adoc[requirements].
 == Physics
 
 *  xref:physics/physics.adoc[Bullet physics binding]
-**  xref:jme3/advanced/walking_character.adoc[Physical characters]
+**  xref:physics:control/walking_character.adoc[Physical characters]
 **  xref:jme3/advanced/hinges_and_joints.adoc[Physical joints and hinges]
 **  xref:jme3/advanced/vehicles.adoc[Ray-cast vehicle]
 **  xref:jme3/advanced/ragdoll.adoc[Ragdoll physics]

docs/modules/tutorials/pages/concepts/faq.adoc

@@ -567,7 +567,7 @@ You can use jBullet's CharacterControl that locks a physical object upright, so
 
 *Learn more:*
 
-* xref:ROOT:jme3/advanced/walking_character.adoc#bettercharactercontrol[BetterCharacterControl]
+* xref:physics:control/walking_character.adoc#bettercharactercontrol[BetterCharacterControl]
 
 *Code Sample:*