fix: always update key images (#3310)

This prevents `0100000000000000000000000000000000000000000000000000000000000000` from showing up and throwing during tx creation
Also bump the monero_c to fix ubuntu26.04 build issue on arm64

cw_monero/lib/monero_wallet.dart

@@ -435,9 +435,7 @@ abstract class MoneroWalletBase extends WalletBase<MoneroBalance,
       throw MoneroTransactionCreationException('The wallet is not synced.');
     }
 
-    if (unspentCoins.isEmpty) {
-      await updateUnspent();
-    }
+    await updateUnspent();
 
     for (final utx in unspentCoins) {
       if (utx.isSending) {

scripts/prepare_moneroc.sh

@@ -16,7 +16,7 @@ fi
 # NOTE: Make sure to update monero_c prebuilds link in workflow files
 # https://github.com/MrCyjaneK/monero_c/releases/download/v0.18.4.6-RC2/release-bundle.zip
 git fetch -a
-git checkout 0b324fe33ff5709feb69e2892767c1be9349957d
+git checkout 5952bef2ec01b0b7e57c11613cbdc081dcd727c5
 git reset --hard
 git submodule update --init --force --recursive