CompatHelper: bump compat for Optimisers to 0.4 for package docs, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the Optimisers package from 0.3 to 0.3, 0.4 for package docs.
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.

[github-actions]

Benchmark Results

Benchmark suite	Current: 7d3b65f	Previous: 61f7c47	Ratio
normal/RepGradELBO + STL/meanfield/Zygote	14837784939 ns	15232590513 ns	0.97
normal/RepGradELBO + STL/meanfield/ForwardDiff	3480739975 ns	3678462770 ns	0.95
normal/RepGradELBO + STL/meanfield/ReverseDiff	3277710473 ns	3416657560 ns	0.96
normal/RepGradELBO + STL/fullrank/Zygote	14683759386 ns	15128103623 ns	0.97
normal/RepGradELBO + STL/fullrank/ForwardDiff	3787173279 ns	3904894267 ns	0.97
normal/RepGradELBO + STL/fullrank/ReverseDiff	5932963381 ns	6176939812 ns	0.96
normal/RepGradELBO/meanfield/Zygote	7072077485 ns	7442618635 ns	0.95
normal/RepGradELBO/meanfield/ForwardDiff	2497658861 ns	2651932936 ns	0.94
normal/RepGradELBO/meanfield/ReverseDiff	1525127434 ns	1561040575 ns	0.98
normal/RepGradELBO/fullrank/Zygote	7105160317 ns	7388622126 ns	0.96
normal/RepGradELBO/fullrank/ForwardDiff	2710436457 ns	2844433010 ns	0.95
normal/RepGradELBO/fullrank/ReverseDiff	2671859307 ns	2692992705 ns	0.99
normal + bijector/RepGradELBO + STL/meanfield/Zygote	22248074782 ns	23506416114 ns	0.95
normal + bijector/RepGradELBO + STL/meanfield/ForwardDiff	8897139785 ns	9343073636 ns	0.95
normal + bijector/RepGradELBO + STL/meanfield/ReverseDiff	4770984529 ns	4840288953 ns	0.99
normal + bijector/RepGradELBO + STL/fullrank/Zygote	22301952197 ns	23564141689 ns	0.95
normal + bijector/RepGradELBO + STL/fullrank/ForwardDiff	9101712857 ns	9744817510 ns	0.93
normal + bijector/RepGradELBO + STL/fullrank/ReverseDiff	7868391792 ns	8057566175 ns	0.98
normal + bijector/RepGradELBO/meanfield/Zygote	13919262646 ns	14862080407 ns	0.94
normal + bijector/RepGradELBO/meanfield/ForwardDiff	7412235310 ns	8331828098 ns	0.89
normal + bijector/RepGradELBO/meanfield/ReverseDiff	2633321749 ns	2727549537 ns	0.97
normal + bijector/RepGradELBO/fullrank/Zygote	13921628386 ns	14584087525 ns	0.95
normal + bijector/RepGradELBO/fullrank/ForwardDiff	7868134174 ns	8756221813 ns	0.90
normal + bijector/RepGradELBO/fullrank/ReverseDiff	4036346648 ns	4225487430 ns	0.96

This comment was automatically generated by workflow using github-action-benchmark.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.20%. Comparing base (616b581) to head (7d3b65f).
Report is 4 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
- Coverage   93.54%   93.20%   -0.35%     
==========================================
  Files          12       12              
  Lines         372      368       -4     
==========================================
- Hits          348      343       -5     
- Misses         24       25       +1     

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