Update jme3_source_structure.adoc

Fixed broken strike through in Physics table.

src/docs/asciidoc/jme3/jme3_source_structure.adoc

@@ -64,7 +64,7 @@ a| src/bullet-common
 a| Classes common between native and java Bullet implementations.
 
 a| src/bullet-native 
-a| Native Bullet implementation C++ classes. +++<strike>jBullet</strike>+++
+a| Native Bullet implementation pass:[C++] classes. +++<strike>jBullet</strike>+++
 
 |===