Bump maven-model from 3.8.5 to 3.8.6

Bumps [maven-model](https://github.com/apache/maven) from 3.8.5 to 3.8.6.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.5...maven-3.8.6)

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

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

maven-plugin/build.gradle

@@ -5,7 +5,7 @@ apply plugin: "com.gradle.plugin-publish"
 description = "Collection of Maven related Gradle plugins"
 
 dependencies {
-    implementation 'org.apache.maven:maven-model:3.8.5'
+    implementation 'org.apache.maven:maven-model:3.8.6'
 
     api project(":okhttp-plugin")