Lua: comments.md incorrectly shows comment close as ]]-- (#5925)

* Lua: comments.md incorrectly shows comment close as ]]--

This is wrong, as in the case
```lua
print(--[[ I am a comment ]]-- 123)
```
The way to close a multiline comment is to close the string with `]]

```lua
print(--[[ I am a comment ]] 123)
```

* Update comments.md

* Update comments.md

* Update comments.md

---------

Author: angusjf

content/lua/concepts/comments/comments.md

@@ -1,21 +1,21 @@
 ---
-Title: 'Comments' # Required; the file name should be the same as the title, but lowercase, with dashes instead of spaces, and all punctuation removed
-Description: 'A comment is text within a program that is not being executed. It can provide additional information to support understanding the code.' # Required; ideally under 150 characters and starts with a noun (used in search engine results and content previews)
-Subjects: # Please only use Subjects in the subjects.md file (https://github.com/Codecademy/docs/blob/main/documentation/subjects.md). If that list feels insufficient, feel free to create a new Subject and add it to subjects.md in your PR!
+Title: 'Comments'
+Description: 'A comment is a text within a program that is not being executed. It can provide additional information to support understanding the code.'
+Subjects:
   - 'Computer Science'
-Tags: # Please only use Tags in the tags.md file (https://github.com/Codecademy/docs/blob/main/documentation/tags.md). If that list feels insufficient, feel free to create a new Tag and add it to tags.md in your PR!
+Tags:
   - 'Comments'
   - 'Documentation'
-CatalogContent: # Please use course/path landing page slugs, rather than linking to individual content items. If listing multiple items, please put the most relevant one first
+CatalogContent:
   - 'learn-lua'
   - 'paths/computer-science'
 ---
 
-A **comment** is text within a program that is not being executed. It can provide additional information to support understanding the code.
+A **comment** is text within a program that is not being executed. It can provide additional information to help understand the code.
 
 ## Single-line Comments
 
-In Lua, two consecutive dashes are used to create single line comments. The compiler does not read any text after `--` on the same line.
+In Lua, two consecutive dashes are used to create single-line comments. The compiler reads no text after `--` on the same line.
 
 ```lua
 function sum(number1, number2)
@@ -29,11 +29,12 @@ The comment does not affect the function.
 
 ## Multi-line Comments
 
-In Lua, multi-line comments are created using the `--[[` syntax to start the comment, and `]]--` to end the comment. The compiler does not read any text in between.
+In Lua, multi-line comments are created using the `--[[` syntax to start the comment and `]]` to end the comment. The compiler does not read any text in between.
 
 ```lua
 --[[ this is a multi-line comment.
  The compiler
  will not run code
- written in between. ]]--
+ written in between.
+]]
 ```