update survey

roles/matrix-awx/surveys/configure_element.json.j2

@@ -52,7 +52,7 @@
     },
     {
       "question_name": "Set Welcome Page Logo",
-      "question_description": "Sets the logo found on the welcome and login page, must be a valid https link to your logo, the logo itself should be a square vector image (SVG).",
+      "question_description": "Sets the logo found on the welcome and login page, must be a valid https link to your logo, the logo itself should be a square vector image (SVG). Leaving this field blank will cause the default Element logo to be used.",
       "required": false,
       "min": 0,
       "max": 1024,