fix typo

Author: sevenrats

source/utils/fakeBlurhash.brs

@@ -113,7 +113,7 @@ function linearTosRGB(value as float)
     end if
 end function
 
-' this function takes a blurhash, a dimensions in terms of elements,
+' this function takes a blurhash, dimensions in terms of elements,
 ' renders the blurhash using the fake-blurhash decoding algorithm
 ' then returns a filesystem uri pointing at the file
 ' the images in the fs are named with a hash of the blurhash string