[adoroszlai]

Rationale for this change

Parquet 1.17.1 includes Jackson 2.21.3, which has several CVEs.

What changes are included in this PR?

Bump Jackson to 2.21.8, the latest in 2.21 release line.

https://github.com/FasterXML/jackson/wiki/Jackson-Release-2.21.8

Are these changes tested?

Dependency tree:

[INFO] --- dependency:3.7.1:tree (default-cli) @ parquet-jackson ---
[INFO] org.apache.parquet:parquet-jackson:jar:1.17.2-SNAPSHOT
[INFO] +- com.fasterxml.jackson.core:jackson-core:jar:2.21.8:compile
[INFO] +- com.fasterxml.jackson.core:jackson-annotations:jar:2.21:compile
[INFO] +- com.fasterxml.jackson.core:jackson-databind:jar:2.21.8:compile
...

CI build/test:
https://github.com/adoroszlai/parquet-java/actions/runs/42890817488

Are there any user-facing changes?

No user-facing changes.

Closes #3693.