use creation year in conf.py

package/docs/conf.py.jinja

@@ -11,7 +11,7 @@ from datetime import datetime
 # -- Project information -------------------------------------------------------
 project = "{{ project_name }}"
 author = "{{ author_first_name }} {{ author_last_name }}"
-copyright = f"2020-{datetime.now().year}, {author}"
+copyright = f"{{ creation_year }}-{datetime.now().year}, {author}"
 release = "0.0.0"
 
 # -- General configuration -----------------------------------------------------