setup-micromamba failing with "Error installing micromamba: socket hang up"

[zaneselvans]

Earlier today we started getting this error in all of our GHA workflows that rely on setup-micromamba (example). It's been very consistent for the last several hours:

Run mamba-org/setup-micromamba@v2
  with:
    environment-file: environments/conda-lock.yml
    environment-name: pudl-dev
    cache-environment: true
  env:
    PUDL_OUTPUT: /home/runner/pudl-work/output/
    PUDL_INPUT: /home/runner/pudl-work/input/
    DAGSTER_HOME: /home/runner/pudl-work/dagster_home/
    ZENODO_SANDBOX_TOKEN_PUBLISH: ***
Will download micromamba to /home/runner/micromamba-bin/micromamba
Install micromamba
  socket hang up
  Waiting 20 seconds before trying again
  socket hang up
  Waiting 17 seconds before trying again
  Error: Error installing micromamba: socket hang up
Error: socket hang up