Fix PM-8134: Change b64 to b64url

[abergs]

Type of change

- [x] Bug fix
- [ ] New feature development
- [ ] Tech debt (refactoring, code cleanup, dependency upgrades, etc)
- [ ] Build/deploy pipeline (DevOps)
- [ ] Other

Objective

https://bitwarden.atlassian.net/browse/PM-8134

We should have used base64url, but accidently used base64

Code changes

• file.ext: Description of what was changed and why

Screenshots

Before you submit

• Please add unit tests where it makes sense to do so (encouraged but not required)
• If this change requires a documentation update - notify the documentation team
• If this change has particular deployment requirements - notify the DevOps team
• Ensure that all UI additions follow WCAG AA requirements

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 28.11%. Comparing base (426bacf) to head (e205d86).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #9193      +/-   ##
==========================================
- Coverage   28.12%   28.11%   -0.01%     
==========================================
  Files        2427     2427              
  Lines       70347    70347              
  Branches    13126    13126              
==========================================
- Hits        19788    19781       -7     
- Misses      49032    49039       +7     
  Partials     1527     1527              

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[github-actions]

Checkmarx One – Scan Summary & Details – 0052b7e8-e26e-4d38-9ffa-d40e58cbb718

No New Or Fixed Issues Found