move changelog to unreleased header

CHANGELOG.md

@@ -2,12 +2,6 @@
 
 # UNRELEASED
 
-# 0.24.1
-
-### feat: More PocketIC flags supported
-
-`dfx start --pocketic` is now compatible with `--artificial-delay` and the `subnet_type`  configuration option, and enables `--enable-canister-http` by default.
-
 ### feat: Support canister log allowed viewer list
 
 Added support for the canister log allowed viewer list, enabling specified users to access a canister's logs without needing to be set as the canister's controller.
@@ -16,6 +10,12 @@ Valid settings are:
 - `--log-viewer` flag with `dfx canister create`
 - `canisters[].initialization_values.log_visibility.allowed_viewers` in `dfx.json`
 
+# 0.24.1
+
+### feat: More PocketIC flags supported
+
+`dfx start --pocketic` is now compatible with `--artificial-delay` and the `subnet_type`  configuration option, and enables `--enable-canister-http` by default.
+
 ## Dependencies
 
 ### Frontend canister