Fix file name (vars.yaml -> vars.yml) to prevent confusion

docs/alternative-architectures.md

@@ -2,7 +2,7 @@
 
 As stated in the [Prerequisites](prerequisites.md), currently only `x86_64` is fully supported. However, it is possible to set the target architecture, and some tools can be built on the host or other measures can be used.
 
-To that end add the following variable to your `vars.yaml` file:
+To that end add the following variable to your `vars.yml` file (see [Configuring playbook](configuring-playbook.md)):
 
 ```yaml
 matrix_architecture: <your-matrix-server-architecture>
@@ -13,7 +13,7 @@ Currently supported architectures are the following:
 - `arm64`
 - `arm32`
 
-so for the Raspberry Pi, the following should be in your `vars.yaml` file:
+so for the Raspberry Pi, the following should be in your `vars.yml` file:
 
 ```yaml
 matrix_architecture: "arm32"

roles/matrix-dendrite/defaults/main.yml

@@ -61,7 +61,7 @@ matrix_dendrite_systemd_wanted_services_list: []
 # Specifies which template files to use when configuring Dendrite.
 # If you'd like to have your own different configuration, feel free to copy and paste
 # the original files into your inventory (e.g. in `inventory/host_vars/<host>/`)
-# and then change the specific host's `vars.yaml` file like this:
+# and then change the specific host's `vars.yml` file like this:
 # matrix_dendrite_template_dendrite_config: "{{ playbook_dir }}/inventory/host_vars/<host>/dendrite.yaml.j2"
 matrix_dendrite_template_dendrite_config: "{{ role_path }}/templates/dendrite/dendrite.yaml.j2"
 

roles/matrix-synapse/defaults/main.yml

@@ -74,7 +74,7 @@ matrix_synapse_in_container_python_packages_path: "/usr/local/lib/python3.9/site
 # Specifies which template files to use when configuring Synapse.
 # If you'd like to have your own different configuration, feel free to copy and paste
 # the original files into your inventory (e.g. in `inventory/host_vars/<host>/`)
-# and then change the specific host's `vars.yaml` file like this:
+# and then change the specific host's `vars.yml` file like this:
 # matrix_synapse_template_synapse_homeserver: "{{ playbook_dir }}/inventory/host_vars/<host>/homeserver.yaml.j2"
 matrix_synapse_template_synapse_homeserver: "{{ role_path }}/templates/synapse/homeserver.yaml.j2"
 matrix_synapse_template_synapse_log: "{{ role_path }}/templates/synapse/synapse.log.config.j2"