Improvements and fixes for Elder Scrolls locale (elder_scrolls.yml)

[SleekMutt]

Motivation / Background

This PR fixes minor typos, and removes a duplicate entry of Tsun first name. Also, it removes DG and DR marks, which indicate that the weapon is from specific DLC, that is redundant in the context of that generator, as items should be named as they are without any technical additions.

Additional information

Correct names for fixed typos can be found here.

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
• Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• Tests are added or updated if you fix a bug, refactor something, or add a feature.
• Tests and Rubocop are passing before submitting your proposed changes.

If you're proposing a new generator or locale:

• Double-check the existing generators documentation to make sure the new generator you want to add doesn't already exist.
• You've reviewed and followed the Contributing guidelines.

[thdaraujo]

thank you!