Update links in README.md

[bcho]

What this PR does / why we need it:

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged):
Fixes #

Please check the following list:

• Does the affected code have corresponding tests, e.g. unit test, E2E test?
• Does this change require a documentation update?
• Does this introduce breaking changes that would require an announcement or bumping the major version?
• Do all new files have an appropriate license header?

[TerryHowe]

/lgtm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.06%. Comparing base (3291d32) to head (1a2daf2).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1408      +/-   ##
==========================================
+ Coverage   85.01%   85.06%   +0.05%     
==========================================
  Files         107      107              
  Lines        3804     3804              
==========================================
+ Hits         3234     3236       +2     
+ Misses        341      339       -2     
  Partials      229      229              

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[qweeah]

@FeynmanZhou Need to setup redirection from https://oras.land/docs/community/* to https://oras.land/community/* so old links are not broken.