fix(pyproject): allow long project description

Author: noelmcloughlin

template/pyproject.toml.jinja

@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "{{project_slug}}"
-description = "{{project_description}}"
+description = "{{ project.description | replace('\n', ' ') | trim }}"
 authors = [
   {name = "{{full_name}}", email = "{{email}}"},
 ]