message: docs: missing quote in lua example
  Risk Level: Low
  Testing: n/a
  Docs Changes: fix typo
  Release Notes: n/a
diff: @@ -522,7 +522,7 @@ its keys can only be *string* or *numeric*.
  function envoy_on_request(request_handle)
  local headers = request_handle:headers()
  request_handle:streamInfo():dynamicMetadata():set("envoy.filters.http.lua", "request.info", {
  - auth: headers:get("authorization),
  + auth: headers:get("authorization"),
  token: headers:get("x-request-token"),
  })
  end
  