config: add missing mainnet standby committee members

[roman-khimov]

See neo-node repo.

[codecov]

Codecov Report

Merging #2103 (63e59ac) into master (bbe4e9c) will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2103      +/-   ##
==========================================
+ Coverage   84.08%   84.09%   +0.01%     
==========================================
  Files         288      288              
  Lines       27102    27102              
==========================================
+ Hits        22788    22791       +3     
+ Misses       3064     3062       -2     
+ Partials     1250     1249       -1     

Impacted Files	Coverage Δ
pkg/network/server.go	73.10% <0.00%> (+0.12%)	⬆️
pkg/services/notary/notary.go	92.85% <0.00%> (+0.79%)	⬆️

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