update upgrade handler for v2.9.0

[skyargos]

Closes: #XXX
Related: #XXX

Description

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For contributor use:

• Targeted PR against correct branch (see CONTRIBUTING.md)
• Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
• Code follows the module structure standards.
• Wrote unit and integration tests
• Updated relevant documentation (docs/) or specification (x/<module>/spec/)
• Added relevant godoc comments.
• Added a relevant changelog entry to the Unreleased section in CHANGELOG.md
• Re-reviewed Files changed in the Github PR explorer

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For admin use:

• Added appropriate labels to PR (ex. WIP, R4R, docs, etc)
• Reviewers assigned
• Squashed all commits, uses message "Merge pull request #XYZ: [title]"

[codecov]

Codecov Report

Merging #793 (8227bcb) into master (9a881da) will increase coverage by 1.10%.
The diff coverage is 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #793      +/-   ##
==========================================
+ Coverage   46.42%   47.53%   +1.10%     
==========================================
  Files         142      142              
  Lines       13608    13292     -316     
==========================================
  Hits         6318     6318              
+ Misses       6732     6416     -316     
  Partials      558      558              

Files	Coverage Δ
app/upgrade_handler.go	17.39% <0.00%> (+16.21%)	⬆️

[0311xuyang]

LGTM