Correct casing and formatting in description.md

Changed the casing of a markdown hyperlink reference to maintain consistency. Also adjusted the formatting of the 'Box drawing characters' table for better legibility. These changes aim to improve the readability and adherence of the documentation to markdown standards.

Author: Jegors Čemisovs

exercises/mazy-mice/description.md

@@ -12,7 +12,7 @@ Here's what you need to know:
 - The program should accept two parameters: rows and columns. The maze should be between 5 and 100 cells in size.
 - A maze which is `x` columns wide and `y` rows high should be `2x + 1` characters wide and `2y + 1` characters high.
 - If no seed is provided, generate a random maze. If the same seed is provided multiple times, the resulting maze should be the same each time.
-- Use [box-drawing][Box-drawing] characters to draw walls, and an arrow symbol (⇨) for the entrance on the left and exit on the right.
+- Use [box-drawing][box-drawing] characters to draw walls, and an arrow symbol (⇨) for the entrance on the left and exit on the right.
 
 It's time to create some perfect mazes for these adventurous mice!
 
@@ -60,18 +60,18 @@ You can use any algorithm to generate a perfect maze. The [recursive backtracker
 
 ### Box drawing characters
 
-| Character | Name                                  | Unicode |
-|:---------:|:--------------------------------------|:--------|
-|     ┌     | box drawings light down and right     |  U+250C |
-|     ─     | box drawings light horizontal         |  U+2500 |
-|     ┬     | box drawings light down and horizontal|  U+252C |
-|     ┐     | box drawings light down and left      |  U+2510 |
-|     │     | box drawings light vertical           |  U+2502 |
-|     └     | box drawings light up and right       |  U+2514 |
-|     ┴     | box drawings light up and horizontal  |  U+2534 |
-|     ┘     | box drawings light up and left        |  U+2518 |
-|     ├     | box drawings light vertical and right |  U+2520 |
-|     ⇨     | rightwards white arrow                |  U+21E8 |
+| Character | Name                                   | Unicode |
+| :-------: | :------------------------------------- | :------ |
+|     ┌     | box drawings light down and right      | U+250C  |
+|     ─     | box drawings light horizontal          | U+2500  |
+|     ┬     | box drawings light down and horizontal | U+252C  |
+|     ┐     | box drawings light down and left       | U+2510  |
+|     │     | box drawings light vertical            | U+2502  |
+|     └     | box drawings light up and right        | U+2514  |
+|     ┴     | box drawings light up and horizontal   | U+2534  |
+|     ┘     | box drawings light up and left         | U+2518  |
+|     ├     | box drawings light vertical and right  | U+2520  |
+|     ⇨     | rightwards white arrow                 | U+21E8  |
 
 [recursive-backtracker]: https://en.wikipedia.org/wiki/Maze_generation_algorithm
-[Box-drawing]: https://en.wikipedia.org/wiki/Box-drawing_character
+[box-drawing]: https://en.wikipedia.org/wiki/Box-drawing_character