Reorder experimental_features in homeserver.yaml.j2 alphabetically

roles/custom/matrix-synapse/templates/synapse/homeserver.yaml.j2

@@ -2987,12 +2987,12 @@ experimental_features:
   {% if matrix_synapse_experimental_features_msc4108_enabled %}
   msc4108_enabled: true
   {% endif %}
-  {% if matrix_synapse_experimental_features_msc4140_enabled %}
-  msc4140_enabled: true
-  {% endif %}
   {% if matrix_synapse_experimental_features_msc4133_enabled %}
   msc4133_enabled: true
   {% endif %}
+  {% if matrix_synapse_experimental_features_msc4140_enabled %}
+  msc4140_enabled: true
+  {% endif %}
   {% if matrix_synapse_experimental_features_msc4222_enabled %}
   msc4222_enabled: true
   {% endif %}