Added the plus sign to the resin counter tool

[Silvaternia]

Describe your changes

• Added a plus sign (+) to the resin counter that was removed in #2151.

Issue or discord link

Testing/validation

Before

After

Checklist before requesting a review (leave this PR as draft if any part of this list is not done.)

• [ ] I have commented my code in hard-to understand areas.
• [ ] I have made corresponding changes to README or wiki.
• [ ] For front-end changes, I have updated the corresponding English translations.
• [ ] I have run yarn run mini-ci locally to validate format and lint.
• [ ] If I have added a new library or app, I have updated the deployment scripts to ignore changes as needed

[github-actions[bot]]

[frontend] [Mon Jun 17 07:22:09 UTC 2024] - Deployed 6e79aa35914819b0ad0051e7dac630549fc0789f to https://genshin-optimizer-prs.github.io/pr/2248/frontend (Takes 3-5 minutes after this completes to be available)

[frontend] [Mon Jun 17 09:24:59 UTC 2024] - Deployed 7c3bf47426ed530b507be98a672fe2da52b273be to https://genshin-optimizer-prs.github.io/pr/2248/frontend (Takes 3-5 minutes after this completes to be available)

[frontend] [Mon Jun 17 18:23:08 UTC 2024] - Deployed be7fc4aefda8723882d56669b85d988a5c40742f to https://genshin-optimizer-prs.github.io/pr/2248/frontend (Takes 3-5 minutes after this completes to be available)

[Mon Jun 17 18:45:54 UTC 2024] - Deleted deployment