feat: updated filter button select state

[LuLaValva]

Fixes #1737

• [x] This PR contains CSS changes
• [ ] This PR does not contain CSS changes

Description

Updated selected state to reflect changes in the design system

Notes

• My Gemfile.lock updated automatically so I kept it in this PR, but it may not belong here. I will remove it if necessary.
• I am not totally happy with my solution for reducing padding as I added borders, let me know if you are aware of a cleaner method.

Screenshots

Before:

### After:

Checklist

• [x] I verify the build is in a non-broken state
• [x] I verify all changes are within scope of the linked issue

• [x] I regenerated all CSS files under dist folder
• [x] I tested the UI in all supported browsers
• [x] I tested the UI in dark mode and RTL mode
• [ ] I added/updated/removed Storybook coverage as appropriate

[LuLaValva]

Should be fixed now, thanks @ArtBlue

[LuLaValva]

Update: This is currently blocked due to an inconsistency in design for dark mode. The dark mode page color is black (#000000) in Figma and in the screenshot in the comment above but it is dark gray (#191919) in the attached issue (#1737).