Minor typo fix

src/docs/asciidoc/jme3/advanced/jme3_srgbpipeline.adoc

@@ -1,4 +1,4 @@
-= Gamma Correction or sRGB pipline
+= Gamma Correction or sRGB pipeline
 :author:
 :revnumber:
 :revdate: 2016/03/17 20:48