docs: display breaking changes first in changelog (#601)

# Motivation

For consistency reasons, in CHANGELOG:

- Move "Breaking changes" as first chapter of the next  release.
- Inline entries.

Signed-off-by: David Dal Busco <[email protected]>

CHANGELOG.md

@@ -1,22 +1,19 @@
 # 2024.xx.yy-hhmmZ
 
+# Breaking changes
+
+- Protocol buffers for hardware wallet transactions are no longer supported. Internet Computer Ledger app 2.4.9 or later is now required.
+- GovernanceCanister.listNeurons no longer throws an error when called with `certified: false` for hardware wallet transactions.
+
 ## Features
 
 - ICP transactions, as provided by the Index canister, have been extended to include their block timestamp information.
-- When no fee is specified when making an ICP transaction, use the mandatory fee
-  of 10000 e8s (0.0001 ICP) instead of fetching the fee from the network.
+- When no fee is specified when making an ICP transaction, use the mandatory fee of 10000 e8s (0.0001 ICP) instead of fetching the fee from the network.
 - Remove hardware wallet specific code paths from `@dfinity/ledger-icp`.
 - Remove hardware wallet specific options from LedgerCanister.
 - Remove dependency on `@dfinity/nns-proto` from `@dfinity/ledger-icp`.
 - Remove hardware wallet specific code and `@dfinity/nns-proto` dependency from `@dfinity/nns`.
 
-# Breaking changes
-
-- Protocol buffers for hardware wallet transactions are no longer supported.
-  Internet Computer Ledger app 2.4.9 or later is now required.
-- GovernanceCanister.listNeurons no longer throws an error when called with
-  `certified: false` for hardware wallet transactions.
-
 # 2024.03.25-1430Z
 
 ## Overview