update wiki url and refine documentation

[nobodyiam]

What's the purpose of this PR

update wiki url and refine documentation

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• Read the Contributing Guide before making this pull request.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit tests to verify the code.
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[codecov-io]

Codecov Report

Merging #3563 (8a55b69) into master (2fdca1f) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #3563      +/-   ##
============================================
- Coverage     50.96%   50.95%   -0.01%     
+ Complexity     2325     2324       -1     
============================================
  Files           447      447              
  Lines         13989    13989              
  Branches       1423     1423              
============================================
- Hits           7129     7128       -1     
  Misses         6373     6373              
- Partials        487      488       +1     

Impacted Files	Coverage Δ	Complexity Δ
...ork/apollo/openapi/client/ApolloOpenApiClient.java	48.27% <ø> (ø)	5.00 <0.00> (ø)
...k/apollo/portal/component/config/PortalConfig.java	21.21% <0.00%> (ø)	9.00 <0.00> (ø)
.../apollo/internals/RemoteConfigLongPollService.java	77.71% <0.00%> (-0.61%)	28.00% <0.00%> (-1.00%)

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