[Docs][Java] Update nightly docs to explain SNAPSHOT version
Open
Component: Documentation
Type: enhancement
- Dominant language
- Java
- Stars
- 94
- Forks
- 152
- Avg merge
- 3d 16h
- Merged PRs (30d)
- 11
Description
### Describe the enhancement requested
I just discovered that the [java nightly docs](https://arrow.apache.org/docs/dev/developers/java/building.html#installing-nightly-packages) don't explain the SNAPSHOT version which is always the most recent build and can be used in projects to avoid having to manually update the version each day.
### Component(s)
Documentation, Java
Contributor guide
Assessment
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