What is the low goal for kenny miller with an average smaller than 0.261?
CREATE TABLE "highest_goalscorers" (
  "name" text,
  "scotland_career" text,
  "caps" real,
  "goals" real,
  "average" real
);
SELECT MIN("goals") FROM "highest_goalscorers" WHERE "name"='kenny miller' AND "average"<0.261;