benchmark: Use more common multisig sizes in the benchmark

[algonautshant]

No description provided.

[codecov]

Codecov Report

Merging #4926 (5a0aee8) into master (5979c09) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4926      +/-   ##
==========================================
- Coverage   53.54%   53.51%   -0.03%     
==========================================
  Files         431      431              
  Lines       53533    53533              
==========================================
- Hits        28662    28650      -12     
- Misses      22644    22658      +14     
+ Partials     2227     2225       -2     

Impacted Files	Coverage Δ
ledger/roundlru.go	90.56% <0.00%> (-5.67%)	⬇️
ledger/tracker.go	74.26% <0.00%> (-3.80%)	⬇️
ledger/blockqueue.go	85.63% <0.00%> (-2.88%)	⬇️
crypto/merkletrie/trie.go	66.42% <0.00%> (-2.19%)	⬇️
crypto/merkletrie/node.go	91.62% <0.00%> (-1.87%)	⬇️
catchup/service.go	68.59% <0.00%> (-1.21%)	⬇️
cmd/tealdbg/debugger.go	72.69% <0.00%> (-0.81%)	⬇️
ledger/acctupdates.go	69.24% <0.00%> (-0.25%)	⬇️
network/wsNetwork.go	64.74% <0.00%> (ø)
ledger/testing/randomAccounts.go	57.23% <0.00%> (+0.61%)	⬆️
... and 3 more

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