Fix indentfirst to be compatible with jinja 3.0.x (#63)

* Fix indentfirst to be compatible with jinja 3.0.x

* Remove first/indentfirst as it is now the default

Author: paulbarfuss

inventory-generation/notifications/templates/list-of-users.yaml.j2

@@ -3,15 +3,15 @@
 full:
   list_of_users:
 {% for user in engagement_users | default([]) %}
-{% filter indent(width=6, indentfirst=False) %}
+{% filter indent(width=6) %}
     - {{ user | to_nice_yaml }}
 {%- endfilter %}
 {%- endfor %}
 
 internal:
   list_of_users:
 {% for user in engagement_users | default([]) %}
-{% filter indent(width=6, indentfirst=False) %}
+{% filter indent(width=6) %}
 {% if 'redhat.com' in user.email %}
     - {{ user | to_nice_yaml }}
 {% endif %}