avro

Bump jackson.version from 2.12.2 to 2.12.3 in /lang/java (#1193)

Bumps `jackson.version` from 2.12.2 to 2.12.3.

Updates `jackson-core` from 2.12.2 to 2.12.3
- [Release notes](https://github.com/FasterXML/jackson-core/releases)
- [Commits](https://github.com/FasterXML/jackson-core/compare/jackson-core-2.12.2...jackson-core-2.12.3)

Updates `jackson-databind` from 2.12.2 to 2.12.3
- [Release notes](https://github.com/FasterXML/jackson/releases)
- [Commits](https://github.com/FasterXML/jackson/commits)

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