Edit the note about "matrix_homeserver_implementation" variable

Since a casual user might want to try another homeserver than Synapse without thinking about its consequence, it is important to clarify that it is not possible to switch homeservers once specified.

Signed-off-by: Suguru Hirahara <acioustick@noreply.codeberg.org>

examples/vars.yml

@@ -13,6 +13,10 @@ matrix_domain: example.com
 # See:
 #  - `roles/custom/matrix-base/defaults/main.yml` for valid options
 # - the `docs/configuring-playbook-IMPLEMENTATION_NAME.md` documentation page, if one is available for your implementation choice
+#
+# By default, we use Synapse, because it's the only full-featured Matrix server at the moment.
+#
+# Note that the homeserver implementation of a server will not be able to be changed without data loss.
 matrix_homeserver_implementation: synapse
 
 # A secret used as a base, for generating various other secrets.

roles/custom/matrix-base/defaults/main.yml

@@ -54,7 +54,7 @@ matrix_homeserver_enabled: true
 # By default, we use Synapse, because it's the only full-featured Matrix server at the moment.
 #
 # This value automatically influences other variables (`matrix_synapse_enabled`, `matrix_dendrite_enabled`, etc.).
-# The homeserver implementation of an existing server cannot be changed without data loss.
+# Note that the homeserver implementation of a server will not be able to be changed without data loss.
 matrix_homeserver_implementation: synapse
 
 # This contains a secret, which is used for generating various other secrets later on.