update CHANGELOG.md to point to the changelog directory

[MAVRICK-1]

What type of PR is this?

/kind documentation

What this PR does / why we need it:
This PR updates the CHANGELOGS.md to point to the overall changelog directory. The current setup is incomplete and difficult to maintain, so adding this link provides a more streamlined and updated experience.

Which issue(s) this PR fixes:
Part of #5484 (update CHANGELOG.md to point to the changelog directory)

Special notes for your reviewer:
None.

Does this PR introduce a user-facing change?:
NONE

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 39.74%. Comparing base (d1433e2) to head (8711b0a).

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Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5708   +/-   ##
=======================================
  Coverage   39.74%   39.74%           
=======================================
  Files         650      650           
  Lines       55125    55125           
=======================================
+ Hits        21907    21912    +5     
+ Misses      31809    31805    -4     
+ Partials     1409     1408    -1     

Flag	Coverage Δ
unittests	39.74% <ø> (+<0.01%)	⬆️

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[zhzhuang-zju]

[FAIL] deployment replicas syncer testing when policy is Divided schedule type, each cluster have more that one replica [It] general case combined hpa scaling and manually modify in Divided type

/retest

[RainbowMango]

/lgtm
/approve

[karmada-bot]

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