Upgrade Rails to 5.2.4.5

[alisan16]

Security failure on all PRs on this repository due to advisory CVE-2021-22880

This was recently updated for Caseflow - department-of-veterans-affairs/caseflow#15900

Name: activerecord
Version: 5.2.4.4
Advisory: CVE-2021-22880
Criticality: Medium
URL: https://groups.google.com/g/rubyonrails-security/c/ZzUqCh9vyhI
Title: Possible DoS Vulnerability in Active Record PostgreSQL adapter
Solution: upgrade to ~> 5.2.4.5, ~> 6.0.3.5, >= 6.1.2.1

Vulnerabilities found!

Failed. Security vulnerabilities were found. Find the dependency in Gemfile.lock,
then specify a safe version of the dependency in the Gemfile (preferred) or
snooze the CVE in .security.yml for a week.
Makefile.example:41: recipe for target 'security' failed
make: *** [security] Error 1

Exited with code exit status 2