Update release drafter footer and formatting

Author: robbievanleeuwen

.github/release-drafter.yml

@@ -34,6 +34,8 @@ categories:
       - "dependencies"
       - "build"
 
+category-template: "### $TITLE"
+
 version-resolver:
   major:
     labels:
@@ -58,4 +60,5 @@ template: |
   $CHANGES
 
 footer: |
-  **Full changelog:** [$PREVIOUS_TAG -> $RESOLVED_VERSION](https://github.com/robbievanleeuwen/section-properties/compare/$PREVIOUS_TAG...$RESOLVED_VERSION)
+
+  **Full changelog:** [$PREVIOUS_TAG...v$RESOLVED_VERSION](https://github.com/robbievanleeuwen/section-properties/compare/$PREVIOUS_TAG...v$RESOLVED_VERSION)