Retrieval of content file(s) failing

[jhlegarreta]

Description

build-test-python-superbuild and build-test-documentation CI builds are consistently failing since some time.
https://github.com/InsightSoftwareConsortium/ITKSphinxExamples/actions/workflows/build-test-publish.yml

It looks like there is a SHA512 content file that cannot be retrieved properly
https://github.com/InsightSoftwareConsortium/ITKSphinxExamples/runs/7933591657?check_suite_focus=true#step:8:8011

from https://insightsoftwareconsortium.github.io/ITKTestingData/SHA512

This results in a compiler error:
https://github.com/InsightSoftwareConsortium/ITKSphinxExamples/runs/7933591657?check_suite_focus=true#step:8:8029

However, the file does exist in https://data.kitware.com:443/api/v1/file/hashsum/SHA512/ (opening the link with the SHA512 checksum downloads the file).

Additional Information

It is unclear to me the example to which the file corresponds (it is apparently named OutputMeshes.png), but the content link of the only file named as such
https://github.com/InsightSoftwareConsortium/ITKSphinxExamples/blob/master/src/Filtering/QuadEdgeMeshFiltering/ComputePlanarParameterizationOfAMesh/OutputMeshes.png.sha512

Also, it looks like the failing content file is not always the same:
#393 (comment)

This is affecting the master branch and any PR that has been submitted lately.

[thewtex]

Addressed in #398

[jhlegarreta]

Closing as #398 has been merged.