Update daemon.py

Author: SamWilsn

src/ethereum_spec_tools/evm_tools/daemon.py

@@ -84,7 +84,7 @@ def do_POST(self) -> None:
             count_opcodes = content.get("count-opcodes", False)
             if count_opcodes:
                 # send opcode counts if ``count-opcodes`` is ``True``
-                args.extend(["--opcodes.count", "stdout"])
+                args.extend(["--opcode.count", "stdout"])
 
             query_string = urlparse(self.path).query
             if query_string: