chore(release): Update RELEASE_NOTES.md to include new structure and sections

This commit restructures the RELEASE_NOTES.md file to provide clearer sections for upgrading, new features, and bug fixes. It removes specific details about the `frequenz-api-assets` dependency update, replacing them with placeholders for future content. This change aims to enhance readability and organization of release notes.

Signed-off-by: eduardiazf <[email protected]>

Author: eduardiazf

RELEASE_NOTES.md

@@ -2,31 +2,16 @@
 
 ## Summary
 
-This release updates the `frequenz-api-assets` dependency to use a version range instead of a specific Git reference, providing more flexibility for dependency updates while maintaining compatibility.
+<!-- Here goes a general summary of what this release is about -->
 
-## Changes
+## Upgrading
 
-### Dependency Updates
+<!-- Here goes notes on how to upgrade from previous versions, including deprecations and what they should be replaced with -->
 
-* **Updated `frequenz-api-assets` dependency**:
-  * Changed from Git reference (`@ git+https://github.com/frequenz-floss/[email protected]`) to version range (`>= 0.1.0, < 0.2.0`)
-  * Enables automatic updates within the specified version range
-  * Maintains backward compatibility while reducing maintenance overhead
+## New Features
 
-## Benefits
+<!-- Here goes the main new features and examples or instructions on how to use them -->
 
-* **Improved dependency management**: Version ranges allow for automatic updates within the specified range
-* **Better compatibility**: Ensures compatibility with the project while allowing for patch and minor version updates
-* **Reduced maintenance overhead**: Eliminates the need to manually update Git references for compatible versions
+## Bug Fixes
 
-## Migration Notes
-
-No migration required. This is a transparent dependency update that maintains full backward compatibility.
-
-## Files Changed
-
-* `pyproject.toml`: Updated the `frequenz-api-assets` dependency specification
-
-## Type of Change
-
-* [x] Dependency update
+<!-- Here goes notable bug fixes that are worth a special mention or explanation -->