[MOB-11443] Bump express dependency version

[pauljung14]

JIRA Ticket(s) if any

• MOB-11443

Description

• Bumps express dependency version to 4.21.2

Test Steps

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 64.85%. Comparing base (172244a) to head (14310ac).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #495   +/-   ##
=======================================
  Coverage   64.85%   64.85%           
=======================================
  Files          47       47           
  Lines        1784     1784           
  Branches      565      564    -1     
=======================================
  Hits         1157     1157           
+ Misses        626      587   -39     
- Partials        1       40   +39     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.