chore: prepare v0.46.15 (#17408)

CHANGELOG.md

@@ -37,6 +37,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ## [Unreleased]
 
+## [v0.46.15](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.46.14) - 2023-08-21
+
 ### Improvements
 
 * (x/gov) [#17387](https://github.com/cosmos/cosmos-sdk/pull/17387) Add `MsgSubmitProposal` `SetMsgs` method. 

RELEASE_NOTES.md

@@ -1,6 +1,6 @@
-# Cosmos SDK v0.46.14 Release Notes
+# Cosmos SDK v0.46.15 Release Notes
 
-This patch release introduces a few bug fixes and improvements to the v0.46.x line of the Cosmos SDK. Notably, an improvement to `<appd> prune` UX and improving the error handling when there is a snapshot creation failure.
+This patch release introduces a few bug fixes and improvements to the v0.46.x line of the Cosmos SDK.
 
 Ensure you have the following replaces in the `go.mod` of your application:
 
@@ -11,6 +11,11 @@ replace github.com/tendermint/tendermint => github.com/cometbft/cometbft v0.34.2
 replace github.com/syndtr/goleveldb => github.com/syndtr/goleveldb v1.0.1-0.20210819022825-2ae1ddf74ef7
 ```
 
-Please see the [CHANGELOG](https://github.com/cosmos/cosmos-sdk/blob/release/v0.46.x/CHANGELOG.md) for an exhaustive list of changes.
+Please see the [CHANGELOG](https://github.com/cosmos/cosmos-sdk/blob/v0.46.15/CHANGELOG.md) for an exhaustive list of changes.
 
-**Full Commit History**: https://github.com/cosmos/cosmos-sdk/compare/v0.46.13...v0.46.14
+**Full Commit History**: https://github.com/cosmos/cosmos-sdk/compare/v0.46.14...v0.46.15
+
+## Deprecation Notice
+
+Get ready for v0.50.0 and start integrating with the next [Cosmos SDK](https://github.com/cosmos/cosmos-sdk/releases/tag/v0.50.0-rc.0) release.
+Once the Eden release is out, as per our [maintenance policy](https://github.com/cosmos/cosmos-sdk/blob/main/RELEASE_PROCESS.md#major-release-maintenance) we will no longer support the v0.46.x line of the Cosmos SDK, apart from critical security fixes.