Bump doxia-site-renderer from 1.10 to 1.11.1

Bumps [doxia-site-renderer](https://github.com/apache/maven-doxia-sitetools) from 1.10 to 1.11.1.
- [Release notes](https://github.com/apache/maven-doxia-sitetools/releases)
- [Commits](apache/maven-doxia-sitetools@doxia-sitetools-1.10...doxia-sitetools-1.11.1)

---
updated-dependencies:
- dependency-name: org.apache.maven.doxia:doxia-site-renderer
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -69,7 +69,7 @@ under the License.
     <javaVersion>8</javaVersion>
     <mavenVersion>3.0</mavenVersion>
     <doxiaVersion>1.11.1</doxiaVersion>
-    <doxia-sitetoolsVersion>1.10</doxia-sitetoolsVersion>
+    <doxia-sitetoolsVersion>1.11.1</doxia-sitetoolsVersion>
     <wagonVersion>2.4</wagonVersion>
     <sonatypeAetherVersion>1.13.1</sonatypeAetherVersion>
     <plexus-java.version>1.1.0</plexus-java.version>