fix version issue for automatic connector install

[subbyte]

This is a patch from Kestrel side. A upstream patch on stix-shifter will be better preventing the issue:
opencybersecurityalliance/stix-shifter#1087

[codecov]

Codecov Report

Base: 80.90% // Head: 80.92% // Increases project coverage by +0.02% 🎉

Coverage data is based on head (342be5e) compared to base (1bbfa7a).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop     #250      +/-   ##
===========================================
+ Coverage    80.90%   80.92%   +0.02%     
===========================================
  Files           39       39              
  Lines         2503     2506       +3     
===========================================
+ Hits          2025     2028       +3     
  Misses         478      478              

Impacted Files	Coverage Δ
src/kestrel_datasource_stixshifter/connector.py	81.63% <100.00%> (+1.19%)	⬆️

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