Bump tomcat.version from 11.0.18 to 11.0.20 (#250)

Bumps `tomcat.version` from 11.0.18 to 11.0.20.

Updates `org.apache.tomcat.embed:tomcat-embed-core` from 11.0.18 to 11.0.20

Updates `org.apache.tomcat.embed:tomcat-embed-el` from 11.0.18 to 11.0.20

Updates `org.apache.tomcat.embed:tomcat-embed-websocket` from 11.0.18 to 11.0.20

---
updated-dependencies:
- dependency-name: org.apache.tomcat.embed:tomcat-embed-core
  dependency-version: 11.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.tomcat.embed:tomcat-embed-el
  dependency-version: 11.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.apache.tomcat.embed:tomcat-embed-websocket
  dependency-version: 11.0.20
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

pom.xml

@@ -79,7 +79,7 @@
 		<jreleaser-maven-plugin.version>1.22.0</jreleaser-maven-plugin.version>
 
 		<!-- transient dependencies added due to security patching -->
-		<tomcat.version>11.0.18</tomcat.version>
+		<tomcat.version>11.0.20</tomcat.version>
 		<netty.version>4.2.10.Final</netty.version>
 
 		<json-smart.version>2.6.0</json-smart.version>