test: Fix rawtransactions test
test: Fix rawtransactions test

Looks like another `assert_raises_jsonrpc` snuck in with #11178.
Change it to `assert_raises_rpc_error`.

chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin,chaincoin/chaincoin