Add `.mvn/wrapper/maven-wrapper.jar` to `.gitignore`.

It's added by runs of the Maven Wrapper, which was added by cl/573917287.

RELNOTES=n/a
PiperOrigin-RevId: 574181333

cpovirk committed 2y ago

46be346721fcdc1a805850799ee549fcd173cf99

Parent: 76b3b3f

Committed by Google Java Core Libraries <java-core-libraries-team+copybara@google.com> on 10/17/2023, 4:57:55 PM