Rename task 'r' to 'run' in pyproject.toml

The 'r' task in the pyproject.toml file was renamed to 'run' for better clarity and readability. This change does not affect functionality but improves code maintainability.

pyproject.toml

@@ -16,4 +16,4 @@ dependencies = [
 
 [tool.taskipy.tasks]
 docs = { cmd = "mkdocs serve", help = "run documentation server" }
-r = { cmd = "python first_api/manage.py runserver", help = "run django dev server" }
+run = { cmd = "python first_api/manage.py runserver", help = "run django dev server" }