Revise "The nopass flag #ql6"

Author: TropicolX

stage_descriptions/auth-03-ql6.md

@@ -27,7 +27,7 @@ The tester will execute your program like this:
 $ ./your_program.sh
 ```
 
-It'll then send an `ACL GETUSER` command specifying the `default` user.
+It will then send an `ACL GETUSER` command specifying the `default` user.
 
 ```bash
 # Expect RESP array: ["flags", ["nopass"]]
@@ -40,4 +40,4 @@ $ redis-cli
 The tester will validate the following for the response:
 
 1. The first element of the array is the string `flags`, encoded as a RESP bulk string.
-2. The second element of the array is a RESP array, and contains the `nopass` flag.
+2. The second element of the array is a RESP array, and contains the `nopass` flag.