fix: comment in app.toml

[doggystylez]

What is the purpose of the change

small fix to comment in app.toml

Brief Changelog

update a comment to reflect the default grpc max-recv-msg-size of 10MB

Testing and Verifying

This change is a trivial rework / code cleanup without any test coverage.

Documentation and Release Note

• Does this pull request introduce a new feature or user-facing behavior changes? ( no)
• Is a relevant changelog entry added to the Unreleased section in CHANGELOG.md? (no)
• How is the feature or change documented? (not applicable)

[github-actions[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[doggystylez]

please see: https://github.com/osmosis-labs/cosmos-sdk/blob/6ed904cdb75fe08a9310e7df49eaf9c5b2b64692/server/config/config.go#L27