issue8785: Development page lists deprecated requirements

[hu-keyu]

Thank you for contributing to Velero!

Please add a summary of your change

Update development doc.

Does your change fix a particular issue?

Fixes #8785

Please indicate you've done the following:

• Accepted the DCO. Commits without the DCO will delay acceptance.
• Created a changelog file (make new-changelog) or comment /kind changelog-not-required on this PR.
• Updated the corresponding documentation in site/content/docs/main.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 59.56%. Comparing base (e5c7c7f) to head (637f9d8).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8835   +/-   ##
=======================================
  Coverage   59.56%   59.56%           
=======================================
  Files         370      370           
  Lines       40239    40239           
=======================================
  Hits        23969    23969           
  Misses      14771    14771           
  Partials     1499     1499           

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[hu-keyu]

@Lyndon-Li @sseago Please review this PR about development doc.