build(deps): bump action versions in generating docs

[shizhMSFT]

What this PR does / why we need it

This PR covers

• build(deps): Bump actions/setup-dotnet from 3 to 4 #80 and upgrade dotnet to 8.x
• build(deps): Bump actions/deploy-pages from 2 to 4 #81
• build(deps): Bump actions/configure-pages from 3 to 4 #82
• build(deps): Bump actions/upload-pages-artifact from 2 to 3 #83

Which issue(s) this PR resolves / fixes

Closes #80
Closes #81
Closes #82
Closes #83

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?

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9650855) 73.07% compared to head (2b8a7fc) 73.07%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #85   +/-   ##
=======================================
  Coverage   73.07%   73.07%           
=======================================
  Files          31       31           
  Lines        1040     1040           
  Branches       91       91           
=======================================
  Hits          760      760           
  Misses        228      228           
  Partials       52       52           

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[Wwwsylvia]

LGTM