Apply suggestions from code review

Author: xrmx

CHANGELOG.md

@@ -7,6 +7,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 **Breaking changes ongoing**
 
+[!IMPORTANT]
 We are working on stabilizing the Log signal that would require making deprecations and breaking changes. We will try to reduce the releases that may require an update to your code, especially for instrumentations or for sdk developers.
 
 ## Unreleased

README.md

@@ -20,6 +20,7 @@ Project versioning information and stability guarantees can be found [here](./ra
 
 ***Breaking Changes**
 
+[!IMPORTANT]
 We are working on stabilizing the Log signal which would require making deprecations and breaking changes. We will try to reduce the releases that may require an update to your code, especially for instrumentations or for SDK developers.
 
 ## Getting started