MHubRunner Extension in Slicer 5.8

[LennyN95]

The Extension has been merged to main in #2137 already - can we merge it into 3.8 too?
Thank you!

[LennyN95]

@jcfr The GH action fails with the following error, is there something I need to change on my end?
@fedorov tried to re-run the workflow but without success.

  FailedFileLoadError: Failed to parse https://raw.githubusercontent.com/Slicer/Slicer/main/Schemas/slicer-extension-catalog-entry-schema-v1.0.1.json
    in "/home/runner/.cache/pre-commit/repo6epn1q6v/py_env-python3.9/lib/python3.9/site-packages/check_jsonschema/schema_loader/readers.py", line 27

The code is no different from what we pushed into the main branch and is available in the nightly version.
Thank you!

[lassoan]

The json schema check is unstable for some reason. Anyway, the file content is correct now and the check passed, so it is good to go.