fix escape spe char

piscine/week03/day04/ex02/audit/README.md

@@ -1,4 +1,4 @@
-##### The question 1 is validated if the ouptut doesn't contain punctuation `!"#$%&'()*+,-./:;<=>?@[]^_\`{|}~`. Do not take into account the spaces in the output. The output should be as: 
+##### The question 1 is validated if the ouptut doesn't contain punctuation ``!"#$%&'()*+,-./:;<=>?@[]^_\`{|}~``. Do not take into account the spaces in the output. The output should be as: 
 ```
 Remove this from  the sentence
 ```