Update mde_proc_pub.pkl

[FlorianBracq]

With the latest version of pandas (2.1.0), some pickle files could not be parsed with the function read_pickle:

• tests/testdata/mde_proc_pub.pkl
• tests/testdata/mordor/mitre_tech_cache.pkl
• tests/testdata/mordor/mitre_tact_cache.pkl

The error triggered in tests/transform/test_process_tree_utils.py and led to all the unit tests in this module to fail.

I'm not sure exactly how those files were generated, but to fix the issue I applied the following steps:

• downgrade to pandas 2.0.3
• Put a breakpoint on where the read_pickle function was called
• Run the test test_process_tree_utils in debug mode
• At the breakpoint, read the pickle file and through the debug console export it with the command:
  df.to_pickle(<filename>)

Then I upgraded back to 2.1.0 and the file appears to be properly parsed now.

[ianhelle]

Awesome Florian - thanks for fixing. Not sure of the reason for this but presumably something to do with a subtle change in the pandas/pickle object model. in v2.1x. I think this version doesn't support Py3.8, which is why this build continued to work.