Release v0.38.5 (#2118)

[Rendered
CHANGELOG.md](https://github.com/cometbft/cometbft/blob/release/v0.38.5/CHANGELOG.md#v0385)

Nightlies manual run:
https://github.com/cometbft/cometbft/actions/runs/7642022293 ✅

---

#### PR checklist

- [ ] Tests written/updated
- [ ] Changelog entry added in `.changelog` (we use
[unclog](https://github.com/informalsystems/unclog) to manage our
changelog)
- [ ] Updated relevant documentation (`docs/` or `spec/`) and code
comments
- [ ] Title follows the [Conventional
Commits](https://www.conventionalcommits.org/en/v1.0.0/) spec

.changelog/v0.38.5/summary.md

@@ -0,0 +1,10 @@
+*January 24, 2024*
+
+This release fixes a problem introduced in `v0.38.3`: if an application
+updates the value of ConsensusParam `VoteExtensionsEnableHeight` to the same value
+(actually a "noop" update) this is accepted in `v0.38.2` but rejected under some
+conditions in `v0.38.3` and `v0.38.4`. Even if rejecting a useless update would make sense
+in general, in a point release we should not reject a set of inputs to
+a function that was previuosly accepted (unless there is a good reason
+for it). The goal of this release is to accept again all "noop" updates, like `v0.38.2` did.
+

CHANGELOG.md

@@ -1,5 +1,22 @@
 # CHANGELOG
 
+## v0.38.5
+
+*January 24, 2024*
+
+This release fixes a problem introduced in `v0.38.3`: if an application
+updates the value of ConsensusParam `VoteExtensionsEnableHeight` to the same value
+(actually a "noop" update) this is accepted in `v0.38.2` but rejected under some
+conditions in `v0.38.3` and `v0.38.4`. Even if rejecting a useless update would make sense
+in general, in a point release we should not reject a set of inputs to
+a function that was previuosly accepted (unless there is a good reason
+for it). The goal of this release is to accept again all "noop" updates, like `v0.38.2` did.
+
+### IMPROVEMENTS
+
+- `[consensus]` Add `chain_size_bytes` metric for measuring the size of the blockchain in bytes
+  ([\#2093](https://github.com/cometbft/cometbft/pull/2093))
+
 ## v0.38.4
 
 *January 22, 2024*

version/version.go

@@ -3,7 +3,7 @@ package version
 const (
 	// TMVersionDefault is the used as the fallback version of CometBFT
 	// when not using git describe. It is formatted with semantic versioning.
-	TMCoreSemVer = "0.38.4"
+	TMCoreSemVer = "0.38.5"
 	// ABCISemVer is the semantic version of the ABCI protocol
 	ABCISemVer  = "2.0.0"
 	ABCIVersion = ABCISemVer