Replace YOUR_BARE_DOMAIN_NAME_HERE with example.com

Remove an explanation about example as it is self-explanatory

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

examples/vars.yml

@@ -7,9 +7,7 @@
 #
 # If you've deployed using the wrong domain, you'll have to run the Uninstalling step,
 # because you can't change the Domain after deployment.
-#
-# Example value: example.com
-matrix_domain: YOUR_BARE_DOMAIN_NAME_HERE
+matrix_domain: example.com
 
 # The Matrix homeserver software to install.
 # See: