Make yamllint happy

roles/custom/matrix-element-admin/defaults/main.yml

@@ -94,4 +94,4 @@ matrix_element_admin_environment_variable_server_name: "{{ matrix_domain }}"
 # matrix_element_admin_environment_variables_additional_variables: |
 #   SOMETHING=1
 #   ANOTHER="here"
-matrix_element_admin_environment_variables_additional_variables: ''
+matrix_element_admin_environment_variables_additional_variables: ''

roles/custom/matrix-element-admin/tasks/validate_config.yml

@@ -23,4 +23,4 @@
     msg: >-
       Element Admin with a path prefix other than '/' is not supported yet.
       You have configured matrix_element_admin_path_prefix to '{{ matrix_element_admin_path_prefix }}'.
-  when: "matrix_element_admin_path_prefix != '/'"
+  when: "matrix_element_admin_path_prefix != '/'"