Rename wallet-tool to bitcoin-wallet in code comment

Author: kristapsk

src/wallet/wallet.cpp

@@ -1027,7 +1027,8 @@ bool CWallet::LoadToWallet(const uint256& hash, const UpdateWalletTxFn& fill_wtx
     if (!fill_wtx(wtx, ins.second)) {
         return false;
     }
-    // If wallet doesn't have a chain (e.g wallet-tool), don't bother to update txn.
+    // If wallet doesn't have a chain (e.g when using bitcoin-wallet tool),
+    // don't bother to update txn.
     if (HaveChain()) {
         bool active;
         auto lookup_block = [&](const uint256& hash, int& height, TxState& state) {