build(deps): bump cosmos-sdk v0.50.9 (backport #4292)

[mergify]

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This is an automatic backport of pull request #4292 done by [Mergify](https://mergify.com).

[mergify]

Cherry-pick of 13f9832 has failed:

On branch mergify/bp/release/v28.x.y/pr-4292
Your branch is up to date with 'origin/release/v28.x.y'.

You are currently cherry-picking commit 13f98324.
  (fix conflicts and run "git cherry-pick --continue")
  (use "git cherry-pick --skip" to skip this patch)
  (use "git cherry-pick --abort" to cancel the cherry-pick operation)

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   go.mod
	both modified:   go.sum
	both modified:   ignite/templates/app/files/go.mod.plush

no changes added to commit (use "git add" and/or "git commit -a")

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally