Fix missing semicolon before comments in jsligo

Motivation and Context

For jsligo, If comments are present between two declations which are not terminated by semi-colon it was a syntax error

Description

This MR fixes the semi-colon insertion for the above mentioned case

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Performance improvement (non-breaking change that improves performance)
• None (change with no changelog)

Changelog

Improves the semi-colon insertion for jsligo

Example file

const test1 = 1
/* Hello */
// There
/* Hello */
// Again
const test2 = 2

Before Fix

$ ligo.57 run test y.jsligo 
File "y.jsligo", line 6, characters 0-5:
  5 | // Again
  6 | const test2 = 2
Ill-formed top-level statement.
At this point, if the statement is complete, one of the following is
expected:
  * a semicolon ';' followed by another statement;
  * a semicolon ';' followed by the end of file;
  * the end of the file.

After Fix

$ ligo run test y.jsligo 
Everything at the top-level was executed.
- test1 exited with value 1.
- test2 exited with value 2.

Checklist:

• Changes follow the existing coding style (use dune @fmt to check).
• Tests for the changes have been added (for bug fixes / feature).
• Documentation has been updated.
• Changelog description has been added (if appropriate).
• Changelog title start with #### (if appropriate).
• There is no image or uploaded file in changelog
• Examples in changed behaviour have been added to the changelog (for breaking change / feature).