polish cmd flags and keep the style of linking multiple words with "-".

[innerpeacez]

• If this pull request closes/resolves/fixes an existing issue, replace the issue number. Closes https://github.com/apache/skywalking/issues/.
• Update the CHANGES log.

[codecov-commenter]

Codecov Report

❗ No coverage uploaded for pull request base (main@a9fd7d3). Click here to learn what that means.
The diff coverage is 100.00%.

❗ Current head 5dd7378 differs from pull request most recent head f9e558f. Consider uploading reports for the commit f9e558f to get more accurate results

@@           Coverage Diff           @@
##             main     #295   +/-   ##
=======================================
  Coverage        ?   44.18%           
=======================================
  Files           ?       93           
  Lines           ?     9804           
  Branches        ?        0           
=======================================
  Hits            ?     4332           
  Misses          ?     5054           
  Partials        ?      418           

Impacted Files	Coverage Δ
banyand/liaison/grpc/server.go	68.47% <100.00%> (ø)
banyand/metadata/metadata.go	34.74% <100.00%> (ø)

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