[4.0.x] Bump com.diffplug.spotless:spotless-maven-plugin from 3.0.0 to 3.1.0#820

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dependabot/maven/4.0.x/com.diffplug.spotless-spotless-maven-plugin-3.1.0jetty-project/jetty-reactive-httpclient:dependabot/maven/4.0.x/com.diffplug.spotless-spotless-maven-plugin-3.1.0Copy head branch name to clipboard