release: Automate GitHub release and docs update

[oscarbenjamin]

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[github-actions]

Benchmark results from GitHub Actions

Lower numbers are good, higher numbers are bad. A ratio less than 1
means a speed up and greater than 1 means a slowdown. Green lines
beginning with + are slowdowns (the PR is slower then master or
master is slower than the previous release). Red lines beginning
with - are speedups.

Significantly changed benchmark results (PR vs master)

· Did not find results for commit upstream/master

Significantly changed benchmark results (master vs previous release)

       before           after         ratio
     [41d90958]       [04bfaabc]
     <sympy-1.11.1^0>                 
-         768±2μs        468±0.5μs     0.61  solve.TimeSparseSystem.time_linear_eq_to_matrix(10)
-        2.16±0ms          864±2μs     0.40  solve.TimeSparseSystem.time_linear_eq_to_matrix(20)
-     4.29±0.01ms         1.27±0ms     0.30  solve.TimeSparseSystem.time_linear_eq_to_matrix(30)

Full benchmark results can be found as artifacts in GitHub Actions
(click on checks at the top of the PR).

[sympy-bot]

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