chore(deps): update plugin ru.vyarus.mkdocs to v4

Author: renovate[bot]

build.gradle

@@ -3,7 +3,7 @@ plugins {
     id 'com.adarshr.test-logger' version '4.0.0'
     id 'org.ajoberstar.grgit' version '5.2.2'
     id "com.github.ben-manes.versions" version '0.51.0'
-    id 'ru.vyarus.mkdocs' version '3.0.0'
+    id 'ru.vyarus.mkdocs' version '4.0.0'
     id "com.github.spotbugs" version "6.0.9"
     id 'com.diffplug.spotless' version '6.25.0'
     id 'io.github.gradle-nexus.publish-plugin' version '2.0.0'