Fixed broken smart quote.

src/docs/asciidoc/jme3/external/blender.adoc

@@ -250,7 +250,7 @@ If you ever see this error:
 
 "No objects or images found to bake to"
 
-You are either missing the image for the "LowPoly" model, or in the Outliner, the camera symbol (Restrict Render) is off (grayed out).
+You are either missing the image for the "`LowPoly`" model, or in the Outliner, the camera symbol (Restrict Render) is off (grayed out).
 ====
 
 .Normal map from Method 2