added napri standalone app platform to 'volume rendering' activities

_modules/multichannel_images.md

@@ -55,7 +55,7 @@ assessment: >
 
     > ## Solution
     > 1. By providing additional context and information that can be leveraged by the model
-    > 1. Not necessarily. In Fiji, one can have an RGB data type without alteration of the image array dimensions (still 2D for xy images). However, in MALTAB and Python, for an RGB, an image array must be at least 3-dimensional
+    > 1. Not necessarily. In Fiji, one can have an RGB data type without alteration of the image array dimensions (still 2D for xy-images). However, in MALTAB and Python, for an RGB, an image array must be at least 3-dimensional
     > 1. Correcting for crosstalk or bleed-through between channels
     {: .solution}