docs: improve readme

README.md

@@ -1,12 +1,16 @@
 # release-tag
 
-This is a fork of [actions/create-release](https://github.com/actions/create-release) with a single change: automatically determine whether a tag is a pre-release by checking for presence of `-` followed by a letter in the tag name.
+This is a fork of [actions/create-release](https://github.com/actions/create-release) with the following changes:
 
-Example:
+- Automatically determine whether a tag is a pre-release by checking for presence of `-` followed by a letter in the tag name.
+- Use [conventional-changelog](https://github.com/conventional-changelog/conventional-changelog/tree/master/packages/conventional-changelog) to generate the changelog as release body.
+
+Usage:
 
 ```yaml
 name: Create release
 
+# When a tag is pushed, create a release
 on:
   push:
     tags:
@@ -20,7 +24,7 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@master
         with:
-          fetch-depth: 0
+          fetch-depth: 0 # Fetch all tags
 
       - name: Create Release for Tag
         id: release_tag
@@ -29,5 +33,7 @@ jobs:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
           tag_name: ${{ github.ref }}
-          preset: angular
+          preset: angular # Use conventional-changelog preset
 ```
+
+Possible values for `preset`: `'angular', 'atom', 'codemirror', 'ember', 'eslint', 'express', 'jquery', 'jshint'`.