Upgrade to polkadot-v1.7.1

Upgrade note:

• MaxHold was deleted from pallet_balances.

To do:

• Upgrade duniter-polkadot-sdk.
• Upgrade duniter subxt.
• Upgrade node.

resources/weight_analyzer/src/lib.rs

@@ -188,7 +188,7 @@ mod tests {
                 .unwrap()
                 .len()
                 == 8
-        ); // 7 extrinsics in pallet
+        ); // 8 extrinsics in pallet
         println!("{:?}", weight_by_pallet); // cargo test  -- --nocapture
     }
     #[test]