element-web camelCase renaming (embeddedPages -> embedded_pages)

roles/custom/matrix-client-element/templates/config.json.j2

@@ -30,7 +30,7 @@
 	{% if matrix_client_element_enable_presence_by_hs_url is not none %}
 		"enable_presence_by_hs_url": {{ matrix_client_element_enable_presence_by_hs_url | to_json }},
 	{% endif %}
-	"embeddedPages": {
+	"embedded_pages": {
 		"homeUrl": {{ matrix_client_element_embedded_pages_home_url | string | to_json }}
 	},
 	{% if matrix_client_element_jitsi_preferredDomain %}