refactor: add title and summary to groups proposal (backport #14465)

CHANGELOG.md

@@ -48,7 +48,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 * (protobuf) [#14476](https://github.com/cosmos/cosmos-sdk/pull/14476) Clean up protobuf annotations `{accepts,implements}_interface`.
 * (x/gov, x/group) [#14472](https://github.com/cosmos/cosmos-sdk/pull/14356) The recommended metadata format for x/gov and x/group proposals now uses an array of strings (instead of a single string) for the `authors` field.
 * (crypto) [#14460](https://github.com/cosmos/cosmos-sdk/pull/14460) Check the signature returned by a ledger device against the public key in the keyring.
-* (x/gov) [#14390](https://github.com/cosmos/cosmos-sdk/pull/14390) Add title, proposer and summary to proposal struct
+* (x/group) [#14465](https://github.com/cosmos/cosmos-sdk/pull/14465) Add title and summary to proposal struct.
+* (x/gov) [#14390](https://github.com/cosmos/cosmos-sdk/pull/14390) Add title, proposer and summary to proposal struct.
 * [#14356](https://github.com/cosmos/cosmos-sdk/pull/14356) Add `events.GetAttributes` and `event.GetAttribute` methods to simplify the retrieval of an attribute from event(s).
 * (types) [#14332](https://github.com/cosmos/cosmos-sdk/issues/14332) Reduce state export time by 50%.
 * (types) [#14163](https://github.com/cosmos/cosmos-sdk/pull/14163) Refactor `(coins Coins) Validate()` to avoid unnecessary map.