Fix: Grammar in a bunch of comments (#7054)

src/tile_map.h

@@ -132,9 +132,9 @@ static inline void SetTileType(TileIndex tile, TileType type)
 }
 
 /**
- * Checks if a tile is a give tiletype.
+ * Checks if a tile is a given tiletype.
  *
- * This function checks if a tile got the given tiletype.
+ * This function checks if a tile has the given tiletype.
  *
  * @param tile The tile to check
  * @param type The type to check against