avro

Bump ant from 1.10.11 to 1.10.12 in /lang/java (#1384)

Bumps ant from 1.10.11 to 1.10.12.

---
updated-dependencies:
- dependency-name: org.apache.ant:ant
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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