Updated PULL_REQUEST_TEMPLATE.md

Updated based on the requested changes

Author: hari-ajidesh

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,10 +1,10 @@
-# Description
+### Description
 
 Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.
 
 Fixes # (issue)
 
-## Type of change
+### Type of change
 
 Please delete options that are not relevant.
 
@@ -13,7 +13,7 @@ Please delete options that are not relevant.
 - [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
 - [ ] This change requires a documentation update
 
-# Checklist:
+### Checklist:
 
 - [ ] branch name follows the branch naming convention mentioned [here](https://github.com/sudiptob2/leet-easy/blob/main/docs/BRANCH-NAMING.md)
 - [ ] commit messages to follow the format mentioned in [contributing.md](https://github.com/sudiptob2/leet-easy/blob/main/docs/CONTRIBUTING.md)