chore(deps): update maven docker tag to v3.8.6 (#7365)

Author: renovate-bot

run/filesystem/Dockerfile

@@ -16,7 +16,7 @@
 
 # Use the official maven/Java 11 image to create a build artifact.
 # https://hub.docker.com/_/maven
-FROM maven:3.8.5-jdk-11 as builder
+FROM maven:3.8.6-jdk-11 as builder
 
 # Copy local code to the container image.
 WORKDIR /app

run/filesystem/gcsfuse.Dockerfile

@@ -15,7 +15,7 @@
 # [START cloudrun_fuse_dockerfile]
 # Use the official maven/Java 11 image to create a build artifact.
 # https://hub.docker.com/_/maven
-FROM maven:3.8.5-jdk-11 as builder
+FROM maven:3.8.6-jdk-11 as builder
 
 # Copy local code to the container image.
 WORKDIR /app