Add Dependabot security PRs to Changelog

Author: aaronskiba

CHANGELOG.md

@@ -6,6 +6,12 @@
 - Validate CSV Separator [#3569](https://github.com/DMPRoadmap/roadmap/pull/3569)
 - Fix rendering of `confirm_merge` partial [#3567](https://github.com/DMPRoadmap/roadmap/pull/3567)
 - Improve CI configuration [#3551](https://github.com/DMPRoadmap/roadmap/issues/3551)
+- Bump nokogiri from 1.17.2 to 1.18.9 [#3547](https://github.com/DMPRoadmap/roadmap/pull/3547)
+- Bump activerecord from 7.1.5.1 to 7.1.5.2 [#3549](https://github.com/DMPRoadmap/roadmap/pull/3549)
+- Bump rack-session from 2.1.0 to 2.1.1 [#3524](https://github.com/DMPRoadmap/roadmap/pull/3524)
+- Bump net-imap from 0.4.19 to 0.4.20 [#3518](https://github.com/DMPRoadmap/roadmap/pull/3518)
+- Bump rexml from 3.4.1 to 3.4.2 [#3562](https://github.com/DMPRoadmap/roadmap/pull/3562)
+- Bump tmp from 0.2.3 to 0.2.4 [#3548](https://github.com/DMPRoadmap/roadmap/pull/3548)
 
 ## v5.0.1
 - Updated seeds.rb file for identifier_schemes to include context value and removed logo_url and idenitifier_prefix for Shibboleth (as it was causing issues with SSO). [#3525](https://github.com/DMPRoadmap/roadmap/pull/3525)