Fix typo.

Author: wacopha

stb_image_resize2.h

@@ -493,7 +493,7 @@ typedef enum
   STBIR_FILTER_TRIANGLE     = 2,  // On upsampling, produces same results as bilinear texture filtering
   STBIR_FILTER_CUBICBSPLINE = 3,  // The cubic b-spline (aka Mitchell-Netrevalli with B=1,C=0), gaussian-esque
   STBIR_FILTER_CATMULLROM   = 4,  // An interpolating cubic spline
-  STBIR_FILTER_MITCHELL     = 5,  // Mitchell-Netrevalli filter with B=1/3, C=1/3
+  STBIR_FILTER_MITCHELL     = 5,  // Mitchell-Netrevali filter with B=1/3, C=1/3
   STBIR_FILTER_POINT_SAMPLE = 6,  // Simple point sampling
   STBIR_FILTER_OTHER        = 7,  // User callback specified
 } stbir_filter;