Fix typo and wording

examples/host-vars.yml

@@ -4,8 +4,8 @@
 # Note: this playbook does not touch the server referenced here.
 # Installation happens on another server ("matrix.<matrix-domain>").
 #
-# Plesae remember, if you've deployed the wrong URL, you have to run the Uninstalling step, 
-# cause you can't change the Domain after deployment.
+# 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