Remove redundant horizontal rules from PR template

The horizontal rules in the pull request template were unnecessary and have been removed to declutter and improve readability.

- Deleted horizontal rules under the purpose and changes sections.
- Ensured formatting remains clean and consistent.

Author: HichemTab-tech

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,8 +2,6 @@
 
 Please describe the purpose of this PR. What problem is being solved, or what feature is being added?
 
----
-
 ## 🧑‍💻 Changes
 
 Please list the changes introduced by this PR. You can format them as bullet points:
@@ -12,8 +10,6 @@ Please list the changes introduced by this PR. You can format them as bullet poi
 - Change 2 (e.g., Fixed bug Y)
 - Change 3 (e.g., Updated dependencies)
 
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-
 ## 🛠️ Fixes or Features
 
 - [ ] **Fix**: If the PR fixes a bug, describe which bug it fixes.