Fix Typos in Comments Across Multiple Files

[leopardracer]

Description:
This pull request addresses several typographical errors in comments across different files in the codebase. The changes include:

1. Arbitrum_ChildMessenger.js:

   • Corrected "neccesary" to "necessary" in a comment.

2. VotingV2.js:

   • Fixed "slasing" to "slashing" and "ballance" to "balance" in a comment.

3. ReserveCurrencyLiquidator.js:

   • Corrected "re-initalize" to "re-initialize" in a comment.

These changes improve the readability and professionalism of the code comments without affecting the functionality.

[daywiss]

@leopardracer you need to sign your commits with -s or i think you can do this within github

[leopardracer]

@leopardracer you need to sign your commits with -s or i think you can do this within github

updated

[daywiss]

@leopardracer for some reason DCO is still not passing, check this page for more information: https://github.com/UMAprotocol/protocol/pull/4819/checks?check_run_id=41232022931