updating readme with py3.10 coming soon

[YunchuWang]

Description

Fixes #

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PR information

• The title of the PR is clear and informative.
• There are a small number of commits, each of which has an informative message. This means that previously merged commits do not appear in the history of the PR. For information on cleaning up the commits in your pull request, see this page.
• If applicable, the PR references the bug/issue that it fixes in the description.
• New Unit tests were added for the changes made and CI is passing.

Quality of Code and Contribution Guidelines

• I have read the contribution guidelines.

[codecov]

Codecov Report

Merging #1059 (487f5a3) into dev (c70c381) will not change coverage.
The diff coverage is n/a.

❗ Current head 487f5a3 differs from pull request most recent head bde7846. Consider uploading reports for the commit bde7846 to get more accurate results

@@           Coverage Diff           @@
##              dev    #1059   +/-   ##
=======================================
  Coverage   83.09%   83.09%           
=======================================
  Files          33       33           
  Lines        1775     1775           
  Branches      282      282           
=======================================
  Hits         1475     1475           
  Misses        232      232           
  Partials       68       68           

Flag	Coverage Δ
unittests	83.09% <ø> (ø)

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