Fix documentation for {y} and {reverseY}

See #1183

Author: timoore

CesiumRasterOverlays/include/CesiumRasterOverlays/UrlTemplateRasterOverlay.h

@@ -84,10 +84,10 @@ class CESIUMRASTEROVERLAYS_API UrlTemplateRasterOverlay final
    *
    * The following template parameters are supported in `url`:
    * - `{x}` - The tile X coordinate in the tiling scheme, where 0 is the westernmost tile.
-   * - `{y}` - The tile Y coordinate in the tiling scheme, where 0 is the nothernmost tile.
+   * - `{y}` - The tile Y coordinate in the tiling scheme, where 0 is the southernmost tile.
    * - `{z}` - The level of the tile in the tiling scheme, where 0 is the root of the quadtree pyramid.
    * - `{reverseX}` - The tile X coordinate in the tiling scheme, where 0 is the easternmost tile.
-   * - `{reverseY}` - The tile Y coordinate in the tiling scheme, where 0 is the southernmost tile.
+   * - `{reverseY}` - The tile Y coordinate in the tiling scheme, where 0 is the northernmost tile.
    * - `{reverseZ}` - The tile Z coordinate in the tiling scheme, where 0 is equivalent to `urlTemplateOptions.maximumLevel`.
    * - `{westDegrees}` - The western edge of the tile in geodetic degrees.
    * - `{southDegrees}` - The southern edge of the tile in geodetic degrees.