docs: prepare v5.2.0 release (cosmos#2212)

prepare v5.2.0 release

Author: mpoke

.changelog/v5.2.0/bug-fixes/provider/1dd3885-msg-validation.md

@@ -0,0 +1,2 @@
+- Improve provider message validation.
+  ([1dd3885](https://github.com/cosmos/interchain-security/commit/1dd38851dbb9e0d98c61bd11375ee7e140527833))

.changelog/v5.2.0/state-breaking/provider/1dd3885-msg-validation.md

@@ -0,0 +1,2 @@
+- Improve provider message validation.
+  ([1dd3885](https://github.com/cosmos/interchain-security/commit/1dd38851dbb9e0d98c61bd11375ee7e140527833))

.changelog/v5.2.0/summary.md

@@ -0,0 +1 @@
+*September 4, 2024*

CHANGELOG.md

@@ -1,5 +1,21 @@
 # CHANGELOG
 
+## v5.2.0
+
+*September 4, 2024*
+
+### BUG FIXES
+
+- [Provider](x/ccv/provider)
+  - Improve provider message validation.
+    ([1dd3885](https://github.com/cosmos/interchain-security/commit/1dd38851dbb9e0d98c61bd11375ee7e140527833))
+
+### STATE BREAKING
+
+- [Provider](x/ccv/provider)
+  - Improve provider message validation.
+    ([1dd3885](https://github.com/cosmos/interchain-security/commit/1dd38851dbb9e0d98c61bd11375ee7e140527833))
+
 ## v5.1.1
 
 *July 26, 2024*

RELEASE_NOTES.md

@@ -1,13 +1,11 @@
-# Replicated Security v5.1.1  Release Notes
+# Replicated Security v5.2.0  Release Notes
 
 ## 📝 Changelog
-Check out the [changelog](https://github.com/cosmos/interchain-security/blob/v5.1.1/CHANGELOG.md) for a list of relevant changes or [compare all changes](https://github.com/cosmos/interchain-security/compare/v5.1.0...v5.1.1) from last release.
+Check out the [changelog](https://github.com/cosmos/interchain-security/blob/v5.2.0/CHANGELOG.md) for a list of relevant changes or [compare all changes](https://github.com/cosmos/interchain-security/compare/v5.1.1...v5.2.0) from last release.
 
 <!-- Add the following line for major or minor releases -->
-Refer to the [upgrading guide](https://github.com/cosmos/interchain-security/blob/release/v5.1.x/UPGRADING.md) when migrating from `v4.3.x` to `v5.1.x`.
+Refer to the [upgrading guide](https://github.com/cosmos/interchain-security/blob/release/v5.2.x/UPGRADING.md) when migrating from `v5.1.x` to `v5.2.x`.
 
 ## 🚀 Highlights
 
-API- and state-breaking change:
-
-This release fixes some bugs found in the message definitions of the provider module, see [\#2095](https://github.com/cosmos/interchain-security/pull/2095) for more details.
+This release fixes a security vulnerability found in the provider module -- it improves the provider message validation

UPGRADING.md

@@ -1,5 +1,15 @@
 # Upgrading Replicated Security
 
+## v5.2.x
+
+### Provider
+
+Providers using versions `v5.1.x` can upgrade to `v5.2.x`.
+
+### Consumer
+
+***This release does not affect the consumer chains.***
+
 ## [v5.1.x](https://github.com/cosmos/interchain-security/releases/tag/v5.1.1)
 
 ### Provider