Update Tomcat to 9.0.91

.env

@@ -1,3 +1,3 @@
 ATS_VERSION=9.1.2
 GO_VERSION=1.22.5
-TOMCAT_VERSION=9.0.87
+TOMCAT_VERSION=9.0.91

CHANGELOG.md

@@ -18,9 +18,10 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/).
 - Updated Go version to 1.22.0
 - [#7979](https://github.com/apache/trafficcontrol/pull/7979) *Traffic Router*, *Traffic Monitor*, *Traffic Stats*: Store logs in /var/log
 - [#7999](https://github.com/apache/trafficcontrol/pull/7999) *Traffic Router*, *Traffic Monitor*, *Traffic Stats*: Symlink from /opt/<component>/var/log to /var/log/<component>. These symlinks are deprecated with the intent of removing them in ATC 9.0.0.
-- [#7872](https://github.com/apache/trafficcontrol/issues/7872) *Traffic Router*: Updated Apache Tomcat from 9.0.43, 9.0.67, 9.0.83, and 9.0.86 to 9.0.87.
+- [#7990](https://github.com/apache/trafficcontrol/pull/7990) *Traffic Router*: Updated Apache Tomcat from 9.0.43, 9.0.67, 9.0.83, and 9.0.86 to 9.0.87.
 - [#7933](https://github.com/apache/trafficcontrol/pull/7933), [#8005](https://github.com/apache/trafficcontrol/pull/8005) *Traffic Portal v2*: Update NodeJS version to 18.
 - [#8009](https://github.com/apache/trafficcontrol/pull/8009) *Traffic Portal v2*: Update NodeJS version to 20.
+- [#8040](https://github.com/apache/trafficcontrol/pull/8040) *Traffic Router*: Get the Tomcat version from .env and update Tomcat to 9.0.90.
 
 ### Fixed
 - [#8008](https://github.com/apache/trafficcontrol/pull/8008) *Traffic Router* Fix czf temp file deletion issue.