Downgrade Docker to Fix RWD

[rajadain]

Overview

The Ubuntu upgrade of #3631 also upgrade Docker to v26, which was incompatible with the old RWD images. For that, we upgraded TauDEM and RWD to the new Docker image format in https://github.com/WikiWatershed/rapid-watershed-delineation/issues/84, https://github.com/WikiWatershed/rapid-watershed-delineation/issues/83, https://github.com/WikiWatershed/docker-taudem/issues/2, https://github.com/WikiWatershed/docker-taudem/issues/1, and https://github.com/WikiWatershed/docker-taudem/issues/5.

Unfortunately, using the new Docker image results in failures recorded here: https://github.com/WikiWatershed/rapid-watershed-delineation/issues/87. Rather than spend more time fixing those, it is easier to downgrade Docker to v25 to work with the old images for now. That's what this PR does.

Closes #3629

Demo

Testing Instructions

Note: this review does not require checking locally, only on staging

• Go to https://staging.modelmywatershed.org/version.txt
  • [x] Ensure you see this branch deployed to staging
• https://staging.modelmywatershed.org/draw and delineate a watershed
  • [x] Ensure it succeeds

[rajadain]

Thanks for reviewing!