e2ee_backup: rename variables to be consistent with naming scheme

roles/matrix-base/defaults/main.yml

@@ -70,12 +70,12 @@ matrix_client_element_e2ee_default: true
 # Controls whether Element should require a secure backup set up before Element can be used.
 # Setting this to true will update `/.well-known/matrix/client` and tell Element require a secure backup.
 # See: https://github.com/vector-im/element-web/blob/develop/docs/e2ee.md
-matrix_client_element_e2ee_backup_required: false
+matrix_client_element_e2ee_secure_backup_required: false
 
 # Controls which backup methods from ["key", "passphrase"] should be used, both is the default.
 # Setting this to other then empty will update `/.well-known/matrix/client` and tell Element which method to use
 # See: https://github.com/vector-im/element-web/blob/develop/docs/e2ee.md
-matrix_client_element_e2ee_backup_methods: []
+matrix_client_element_e2ee_secure_backup_setup_methods: []
 
 # The Docker network that all services would be put into
 matrix_docker_network: "matrix"

roles/matrix-base/templates/static-files/well-known/matrix-client.j2

@@ -29,8 +29,8 @@
 	,
 	"io.element.e2ee": {
 		"default": {{ matrix_client_element_e2ee_default|to_json }},
-		"secure_backup_required": {{ matrix_client_element_e2ee_backup_required|to_json }},
+		"secure_backup_required": {{ matrix_client_element_e2ee_secure_backup_required|to_json }},
-		"secure_backup_setup_methods": {{ matrix_client_element_e2ee_backup_methods|to_json }}
+		"secure_backup_setup_methods": {{ matrix_client_element_e2ee_secure_backup_setup_methods|to_json }}
 	},
 	"im.vector.riot.e2ee": {
 		"default": {{ matrix_client_element_e2ee_default|to_json }}