Fixed Apache Ant version in Dockerfile

[dtemir]

Description

The main.yml workflow kept failing on me, so I figured it would be useful to fix the Apache Ant version issue that was making the docker build fail.

You can find the successful build logs here: https://github.com/dtemir/labgraph/runs/6014180685?check_suite_focus=true You can find the unsuccessful build logs here: https://github.com/facebookresearch/labgraph/runs/5803725955?check_suite_focus=true

Type of change

• [X] Bug fix (non-breaking change which fixes an issue)

Feature/Issue validation/testing

Testing is done by running the main.yml in GitHub Actions

Checklist:

• [X] New and existing unit tests pass locally with these changes?

[jfResearchEng]

Thanks for this fix!