MINOR: [Java] Bump com.diffplug.spotless:spotless-maven-plugin from 2.30.0 to 2.43.0#31

dependabot[bot] wants to merge 1 commit intomainapache/arrow-java:mainfrom

dependabot/maven/com.diffplug.spotless-spotless-maven-plugin-2.43.0apache/arrow-java:dependabot/maven/com.diffplug.spotless-spotless-maven-plugin-2.43.0Copy head branch name to clipboard