fix: use base64 explicitly

learning-examples/check_boding_curve_status.py

@@ -46,7 +46,7 @@ def get_associated_bonding_curve_address(
 async def get_bonding_curve_state(
     conn: AsyncClient, curve_address: Pubkey
 ) -> BondingCurveState:
-    response = await conn.get_account_info(curve_address)
+    response = await conn.get_account_info(curve_address, encoding="base64")
     if not response.value or not response.value.data:
         raise ValueError("Invalid curve state: No data")