Suppress tornado 6.2 beta warnings

[blink1073]

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[codecov-commenter]

Codecov Report

Merging #33 (16d1065) into main (88b543b) will decrease coverage by 0.38%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
- Coverage   81.93%   81.54%   -0.39%     
==========================================
  Files           7        7              
  Lines         238      233       -5     
  Branches       31       31              
==========================================
- Hits          195      190       -5     
  Misses         33       33              
  Partials       10       10              

Impacted Files	Coverage Δ
jupyter_server_terminals/base.py	71.42% <0.00%> (-3.58%)	⬇️
jupyter_server_terminals/api_handlers.py	95.83% <0.00%> (-0.33%)	⬇️

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