Fix CI and update readme

[cschreib]

This is just a maintenance PR:

• Fix the CI scripts not running anymore after GitHub stopped supporting upload-artifact/v2.
• Fix TOC link in README not using auto-link.
• Update benchmarks (not updated for a while).
• Update version number in preparation for next release.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.03%. Comparing base (fab51bf) to head (61855bf).
Report is 6 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #184   +/-   ##
=======================================
  Coverage   94.03%   94.03%           
=======================================
  Files          29       29           
  Lines        1709     1709           
=======================================
  Hits         1607     1607           
  Misses        102      102           

Flag	Coverage Δ
	94.03% <ø> (?)

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