🛠 Fix descriptions

roles/k3s_custom_registries/defaults/main.yml

@@ -1,6 +0,0 @@
----
-# Indicates whether custom registries for k3s should be configured
-# Possible values:
-#   - present
-#   - absent
-state: present

roles/k3s_custom_registries/meta/main.yml

@@ -17,3 +17,4 @@ argument_specs:
             If all you need is your own images and you don't care about
             caching the docker/quay/ghcr.io images, you can just remove
             those from the mirrors: section.
+        required: true