fix: cli: add ArgsUsage field to clientGetDealCmd

[rjan90]

Adds [proposalCID] as ArgsUsage field in the 'lotus client get-deal' command. Fixes #8133

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[magik6k]

Needs make docsgen-cli

[codecov]

Codecov Report

Merging #8241 (3ad1ea3) into master (c98ef0a) will decrease coverage by 0.11%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #8241      +/-   ##
==========================================
- Coverage   40.39%   40.28%   -0.12%     
==========================================
  Files         679      679              
  Lines       73992    73992              
==========================================
- Hits        29890    29805      -85     
- Misses      38898    38962      +64     
- Partials     5204     5225      +21     

Impacted Files	Coverage Δ
cli/client.go	22.23% <ø> (ø)
lib/addrutil/parse.go	75.00% <0.00%> (-15.91%)	⬇️
chain/actors/builtin/miner/diff.go	48.52% <0.00%> (-10.30%)	⬇️
chain/events/observer.go	71.64% <0.00%> (-6.72%)	⬇️
chain/exchange/peer_tracker.go	66.66% <0.00%> (-4.31%)	⬇️
miner/warmup.go	71.42% <0.00%> (-4.09%)	⬇️
storage/wdpost_sched.go	77.45% <0.00%> (-3.93%)	⬇️
miner/miner.go	56.39% <0.00%> (-3.61%)	⬇️
node/modules/core.go	46.46% <0.00%> (-3.04%)	⬇️
chain/events/events_called.go	83.90% <0.00%> (-2.44%)	⬇️
... and 21 more