docs: Add link to changelog in release notes

[terrytangyuan]

Signed-off-by: terrytangyuan [email protected]

Checklist:

• My organization is added to USERS.md.

Tips:

• Your PR needs to pass the required checks before it can be approved. If the check is not required (e.g. E2E tests) it does not need to pass
• Sign-off your commits to pass the DCO check: git commit --signoff.
• Run make pre-commit -B to fix codegen or lint problems.
• Say how how you tested your changes. If you changed the UI, attach screenshots.

[codecov]

Codecov Report

Merging #6085 (2f4bfb4) into master (53bd960) will decrease coverage by 0.03%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #6085      +/-   ##
==========================================
- Coverage   47.64%   47.61%   -0.04%     
==========================================
  Files         249      249              
  Lines       15737    15737              
==========================================
- Hits         7498     7493       -5     
- Misses       7302     7305       +3     
- Partials      937      939       +2     

Impacted Files	Coverage Δ
cmd/argoexec/commands/emissary.go	48.43% <0.00%> (-1.57%)	⬇️
workflow/controller/operator.go	70.75% <0.00%> (-0.28%)	⬇️
cmd/argo/commands/get.go	57.09% <0.00%> (+0.64%)	⬆️

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