Update OptimizationMOI README

[odow]

Raised on slack:

[codecov]

Codecov Report

Merging #351 (cd73c69) into master (bd1c191) will decrease coverage by 76.69%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #351       +/-   ##
==========================================
- Coverage   79.34%   2.65%   -76.70%     
==========================================
  Files           9       9               
  Lines         276     264       -12     
==========================================
- Hits          219       7      -212     
- Misses         57     257      +200     

Impacted Files	Coverage Δ
src/function/function.jl	0.00% <0.00%> (-100.00%)	⬇️
src/function/forwarddiff.jl	0.00% <0.00%> (-95.24%)	⬇️
src/function/finitediff.jl	0.00% <0.00%> (-93.03%)	⬇️
src/function/mtk.jl	0.00% <0.00%> (-81.14%)	⬇️
src/function/zygote.jl	0.00% <0.00%> (-80.00%)	⬇️
src/function/reversediff.jl	0.00% <0.00%> (-79.17%)	⬇️
src/function/tracker.jl	0.00% <0.00%> (-75.00%)	⬇️
src/utils.jl	0.00% <0.00%> (-31.71%)	⬇️
src/Optimization.jl	100.00% <0.00%> (ø)

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[ChrisRackauckas]

I'll accept this for now, but we need to change this to strict build @Vaibhavdixit02