fix: temporarily disable arm64 build (#3624)
### Summary
Per [this
job](https://github.com/Unstructured-IO/unstructured/actions/runs/10842120429/job/30087252047),
`arm64` builds are currently failing, likely because the workaround for
the broken `mesa-gl` package from the `wolfi` repository only works for
`amd64`. Temporarily disabling the `arm64` build in order to push out
the latest `amd64` image with security patches, then will revert and
work the fix for the `arm64` image.
- https://github.com/Unstructured-IO/base-images/pull/44
