Update shaderblow.adoc

Fixed broken link.

src/docs/asciidoc/sdk/plugin/shaderblow.adoc

@@ -759,7 +759,7 @@ Features:
 |===
 
 a|.GLSL Texture Bomb 
-image:sdk/plugin/3lBhu2c5V8o.jpg[youtube_3lBhu2c5V8o,width="",height="",link"https://youtu.be/3lBhu2c5V8o"]
+image:sdk/plugin/3lBhu2c5V8o.jpg[youtube_3lBhu2c5V8o,width="",height="",link="https://youtu.be/3lBhu2c5V8o"]
 
 |===