chore: Fixed CI pypi automatic publish upon release

[fg-mindee]

This PR introduces the following modifications:

• removed CI to build conda since it cannot work for now as per [conda] Unable to make a conda build #113
• fixed pypi upload job (renamed doctr to python-doctr before upload): each new release created on Github will trigger the publishing on pypi automatically

Any feedback is welcome!

[codecov]

Codecov Report

Merging #153 (80bb56c) into main (19a8667) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #153   +/-   ##
=======================================
  Coverage   98.02%   98.02%           
=======================================
  Files          34       34           
  Lines        1165     1165           
=======================================
  Hits         1142     1142           
  Misses         23       23           

Flag	Coverage Δ
unittests	98.02% <ø> (ø)

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[charlesmindee]

Thnaks for the PR !