Fix: progress bar

[BryanF1nes]

Because

Fixes the progress bar z-index properties when someone has fully completed a course.

This PR

• Changed z-10 to z-20 within the main svg element
• Changed z-20 to z-10 within the child div element

Issue

This PR does not close specific issue.

Additional Information

Video showcasing the bug: Screencast from 04-10-2024 07:58:10 AM.webm

Video showcasing the fix: Screencast from 04-10-2024 09:40:23 AM.webm

Pull Request Requirements

• [x] I have thoroughly read and understand The Odin Project Contributing Guide
• [x] The title of this PR follows the keyword: brief description of change format, using one of the following keywords:
  • Feature - adds new or amends existing user-facing behavior
  • Chore - changes that have no user-facing value, refactors, dependency bumps, etc
  • Fix - bug fixes
• [x] The Because section summarizes the reason for this PR
• [x] The This PR section has a bullet point list describing the changes in this PR
• [x] I have verified all tests and linters pass after making these changes.
• [x] If this PR addresses an open issue, it is linked in the Issue section
• [ ] If applicable, this PR includes new or updated automated tests