try to include this in weekly dependency updates

[jmartin-sul]

off-hand, the two types of update i can think of are:

• dependency updates just do the gradle wrapper, e.g. run ./gradlew wrapper --gradle-version=latest --distribution-type=bin and check in the artifacts from that, per instructions added in README: corrections and clarifications of build instructions, formatting touchups #71.
• some sort of automatic update of dependencies in build.gradle. or maybe just a fresh build using the constraints/pinnings in that file?

i think either would use the same hook as e.g. the poetry updates in was-pywb, see https://github.com/sul-dlss/was-pywb/blob/main/.autoupdate/preupdate

having automatic tagging and deployment of new builds seems trickier and more fraught with peril, so i think we'd still be manually releasing new builds, and wouldn't necessarily have a clear indication of when to do so, since there's no easy way to see what dependencies changed, afaict. but it still seems useful, and potentially not a huge effort, to see when the build would break.