fix "boolean" query for sqlite (#1727)

use false

lnbits/core/crud.py

@@ -336,7 +336,7 @@ async def get_latest_payments_by_extension(ext_name: str, ext_id: str, limit: in
     rows = await db.fetchall(
         f"""
         SELECT * FROM apipayments
-        WHERE pending = 'false'
+        WHERE pending = false
         AND extra LIKE ?
         AND extra LIKE ?
         ORDER BY time DESC LIMIT {limit}