Updates for tfc-agent release 1.22.5 (#511)

This PR updates the docs for the 1.22.5 release

https://hashicorp.atlassian.net/browse/TFDN-967

Author: lafentres

content/terraform-docs-agents/v1.22.x/docs/cloud-docs/agents/changelog.mdx

@@ -18,6 +18,12 @@ within each release are categorized into one or more of the following labels:
 Each version below corresponds to a release artifact available for download on
 the official [releases website](https://releases.hashicorp.com/tfc-agent/).
 
+## 1.22.5 (06/24/2025)
+
+SECURITY:
+
+* Updated dependency `github.com/go-chi/chi/v5` to `v5.2.2` to resolve vulnerability [GHSA-vrw8-fxc6-2r93](https://github.com/go-chi/chi/security/advisories/GHSA-vrw8-fxc6-2r93) (#1086)
+
 ## 1.22.4 (06/11/2025)
 
 BUG FIXES: