Bump org.apache.maven:maven-model from 3.8.8 to 3.8.9

Bumps org.apache.maven:maven-model from 3.8.8 to 3.8.9.

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-model
  dependency-version: 3.8.9
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

docs/pom.xml

@@ -14,7 +14,7 @@
 	<properties>
 		<main.basedir>${basedir}/..</main.basedir>
 
-		<maven.version>3.8.8</maven.version>
+		<maven.version>3.8.9</maven.version>
 		<handlebars.version>4.3.1</handlebars.version>
 		<asciidoctorj.version>2.5.3</asciidoctorj.version>
 		<commons-io.version>2.11.0</commons-io.version>