docs: fixing documentation (#59)

Author: stevehouel

README.md

@@ -95,11 +95,4 @@ Powertools extends the functionality of Log4J. Below is an example `log4j2.xml`
 
 ## License
 
-This library is licensed under the Apache License, Version 2.0. See the LICENSE file.
-
-
-
-Cold Start
-
-946.58 ms - original
-943.96 ms - power tools
+This library is licensed under the Apache License, Version 2.0. See the LICENSE file.

docs/content/core/tracing.mdx

@@ -10,7 +10,7 @@ a provides functionality to reduce the overhead of performing common tracing tas
 
 ![Tracer showcase](../media/tracer_utility_showcase.png)
 
- ** Key Features
+ **Key Features**
 
  * Capture cold start as annotation, and responses as well as full exceptions as metadata
  * Helper methods to improve the developer experience of creating new X-Ray subsegments.