fix donation func typo

prisma/migrations/20221209201457_donate_func2/migration.sql

@@ -0,0 +1,25 @@
+CREATE OR REPLACE FUNCTION donate(sats INTEGER, user_id INTEGER)
+RETURNS INTEGER
+LANGUAGE plpgsql
+AS $$
+DECLARE
+    user_sats INTEGER;
+BEGIN
+    PERFORM ASSERT_SERIALIZED();
+
+    SELECT msats / 1000
+    INTO user_sats
+    FROM users WHERE id = user_id;
+
+    IF sats > user_sats THEN
+        RAISE EXCEPTION 'SN_INSUFFICIENT_FUNDS';
+    END IF;
+
+    UPDATE users SET msats = msats - (sats * 1000) WHERE id = user_id;
+
+    INSERT INTO "Donation" (sats, "userId", created_at, updated_at)
+    VALUES (sats, user_id, now_utc(), now_utc());
+
+    RETURN sats;
+END;
+$$;