[lua] Adjust starter mob attack to match retail damage

[ThrisStraizo]

I affirm:

• I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• I have read and understood the Contributing Guide and the Code of Conduct.
• I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

This PR adjusts the attack of starter mobs to deal the same damage observed on retail.
Their base damage is definitely correct right now, but their current attack lets him hit for 3's often, which does not happen on retail. Retail starter mobs hit for 1-2 with an occasionally rare 0.

[18:20:33]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:20:39]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:20:46]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:20:52]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:20:58]The Tiny Mandragora hits Dontguardmebro for 2 points of damage.
[18:21:13]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:21:27]The Tiny Mandragora hits Dontguardmebro for 2 points of damage.
[18:21:30]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:21:33]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:21:35]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:21:39]The Tiny Mandragora hits Dontguardmebro for 2 points of damage.
[18:21:42]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:21:46]The Tiny Mandragora hits Dontguardmebro for 1 point of damage.
[18:21:47]The Tiny Mandragora hits Dontguardmebro for 2 points of damage.
[18:21:51]The Tiny Mandragora hits Dontguardmebro for 2 points of damage.
[18:24:29]The Tiny Mandragora hits Dontguardmebro for 0 points of damage.

Steps to test these changes

Get smacked with a brand new character and receive similar damage to retail.