Who is the shirt sponsor of the team with an average squad age of 25.46?
CREATE TABLE "personnel_and_kits" (
  "team" text,
  "manager" text,
  "captain" text,
  "kit_manufacturer" text,
  "shirt_sponsor" text,
  "average_squad_age" text
);
SELECT "shirt_sponsor" FROM "personnel_and_kits" WHERE "average_squad_age"='25.46';