fix: multiprocessing example

[bednar]

Closes #578

Proposed Changes

1. Fixed rx chain
2. Add new source of data => using gzip compression in example

Checklist

• [x] CHANGELOG.md updated
• [x] Rebased/mergeable
• [x] pytest tests completes successfully
• [x] Commit messages are conventional
• [x] Sign CLA (if not already signed)

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 90.43%. Comparing base (0dcc35b) to head (e1990e4). Report is 10 commits behind head on master.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #664 +/- ## ======================================= Coverage 90.43% 90.43% ======================================= Files 40 40 Lines 3524 3524 ======================================= Hits 3187 3187 Misses 337 337 ```

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