CompatHelper: bump compat for TensorAlgebra to 0.20, (keep existing compat)

[ITensorBot]

This pull request changes the compat entry for the TensorAlgebra package from 0.19.2 to 0.19.2, 0.20.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.02%. Comparing base (2323d1b) to head (9341421).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #262   +/-   ##
=======================================
  Coverage   82.02%   82.02%           
=======================================
  Files          38       38           
  Lines        2504     2504           
=======================================
  Hits         2054     2054           
  Misses        450      450           

Flag	Coverage Δ
docs	0.00% <ø> (ø)

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