Add a sleep in Jupyter Backend poll loop

[kafonek]

Re: conversation at https://noteables.slack.com/archives/C02FHK2RVLH/p1661454678229579?thread_ts=1661442230.269859&cid=C02FHK2RVLH

[kafonek]

Current dependencies on/for this PR:

• main
  • PR Add a sleep in Jupyter Backend poll loop #37 👈

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[codecov-commenter]

Codecov Report

Merging #37 (671167b) into main (c95f327) will decrease coverage by 0.33%.
The diff coverage is 81.81%.

@@            Coverage Diff             @@
##             main      #37      +/-   ##
==========================================
- Coverage   95.71%   95.37%   -0.34%     
==========================================
  Files           8        8              
  Lines         467      476       +9     
==========================================
+ Hits          447      454       +7     
- Misses         20       22       +2     

Impacted Files	Coverage Δ
sending/backends/jupyter.py	97.67% <81.81%> (-2.33%)	⬇️

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