Add copyright notice to footer

Author: kieranr51

mkdocs.yml

@@ -2,6 +2,7 @@ site_name: Hunt Lab Small RNA Pipeline
 site_url: https://Vicky-Hunt-Lab.github.io/HuntLab-smallRNA
 repo_url: https://github.com/Vicky-Hunt-Lab/HuntLab-smallRNA
 repo_name: Vicky-Hunt-Lab/HuntLab-smallRNA
+copyright: Copyright © 2021 - 2025 Kieran Reynolds & Vicky Hunt Lab Members
 nav:
   - Home: index.md
   - Installation: installation.md