Add categories to readme-vars.yml

Author: quietsy

readme-vars.yml

@@ -12,6 +12,7 @@ project_blurb: |
   * Plugin System
   * Much more...
 project_lsio_github_repo_url: "https://github.com/linuxserver/docker-{{ project_name }}"
+project_categories: "Downloaders"
 # supported architectures
 available_architectures:
   - {arch: "{{ arch_x86_64 }}", tag: "amd64-latest"}