chore: update meaning of type-prefix! in production PRs (cosmos#2597)

* update meaning of type-prefix! in PRs

* apply review suggestions

.github/PULL_REQUEST_TEMPLATE/production.md

@@ -21,7 +21,7 @@ please add links to any relevant follow up issues.*
 I have...
 
 * [ ] Included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
-* [ ] Added `!` to the type prefix if API or client breaking change
+* [ ] Added `!` to the type prefix if API, client, or state breaking change (i.e., requires minor or major version bump)
 * [ ] Targeted the correct branch (see [PR Targeting](https://github.com/cosmos/gaia/blob/main/CONTRIBUTING.md#pr-targeting))
 * [ ] Provided a link to the relevant issue or specification
 * [ ] Followed the guidelines for [building SDK modules](https://github.com/cosmos/cosmos-sdk/blob/main/docs/docs/building-modules)