refactor: update progress bar color to primary brand color

[crnkovic]

Summary

Just something that was annoying me: the progress bar at the top when navigating through pages currently uses the default Tailwind gray color. I updated it to use our primary-700 color. Open for discussion.

Checklist

• I checked my UI changes against the design and there are no notable differences
• I checked my UI changes for any responsiveness issues
• I checked my (code) changes for obvious issues, debug statements and commented code
• I opened a corresponding card on Clickup for any remaining TODOs in my code
• I added a short description on how to test this PR (if necessary)
• I added a storybook entry for the component that was added (if necessary)
• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[ItsANameToo]

I honestly have a hard time running into that loading bar when navigating the website

[ItsANameToo]

for anyone else wanting to test this, enable throttling (fast 3G) in devtools if you don't get the loading bar when you navigate normally