Build(deps): Bump version.org.apache.tomcat-11.0

Bumps `version.org.apache.tomcat-11.0` from 11.0.20 to 11.0.21.

Updates `org.apache.tomcat:tomcat-catalina` from 11.0.20 to 11.0.21

Updates `org.apache.tomcat:tomcat-coyote` from 11.0.20 to 11.0.21

Updates `org.apache.tomcat:tomcat-util` from 11.0.20 to 11.0.21

---
updated-dependencies:
- dependency-name: org.apache.tomcat:tomcat-catalina
  dependency-version: 11.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.tomcat:tomcat-coyote
  dependency-version: 11.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.tomcat:tomcat-util
  dependency-version: 11.0.21
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

container/tomcat-11.0/pom.xml

@@ -14,7 +14,7 @@
     <name>mod_cluster: Container - Tomcat 11.0</name>
 
     <properties>
-        <version.org.apache.tomcat-11.0>11.0.20</version.org.apache.tomcat-11.0>
+        <version.org.apache.tomcat-11.0>11.0.21</version.org.apache.tomcat-11.0>
     </properties>
 
     <dependencies>