fix links to shaderblow

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

@@ -214,7 +214,7 @@ image:jme3/advanced/shaderblow_glass.jpg[shaderblow_glass.jpg,width="80",height=
 image:jme3/advanced/shaderblow_matcap.jpg[shaderblow_matcap.jpg,width="150",height="150",align="right"] +
 image:jme3/advanced/shaderblow_light2.jpg[shaderblow_light2.jpg,width="66",height="150",align="right"]
 
-<<sdk/plugin/shaderblow#,ShaderBlow - GLSL Shader Library>>
+xref:sdk:plugin/shaderblow.adoc[ShaderBlow - GLSL Shader Library]
 
 *  LightBlow Shader – blend material texture maps.
 *  FakeParticleBlow Shader – jet, fire effect.

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

@@ -11,7 +11,7 @@ Shaders for JMonkey Engine.
 
 Project is hosted here: https://github.com/jMonkeyEngine-Contributions/shaderblowlib[https://github.com/jMonkeyEngine-Contributions/shaderblowlib]
 
-*  <<sdk/plugin/shaderblow#,The ShaderBlow Wiki>>
+*  xref:sdk:plugin/shaderblow.adoc[The ShaderBlow Wiki]
 
 // Get a local copy of the jme-glsl-shaders repository with this command: hg clone link:https://[email protected]/p/jme-glsl-shaders/[https://[email protected]/p/jme-glsl-shaders/]