f string embedded quote correction

Co-authored-by: Ryan Mast <[email protected]>

helics/cli.py

@@ -311,7 +311,7 @@ def run(path, silent, connect_server, no_log_files, no_kill_on_error):
             if p_args[0] is None:
                 raise click.ClickException("UnrecognizedCommandError: The command specified in exec string is not a "
                                            "recognized command in the system. The user provided exec string is "
-                                           f"{f["exec"]}.")
+                                           f"{f['exec']}.")
             p = subprocess.Popen(
                 p_args,
                 cwd=os.path.abspath(os.path.expanduser(directory)),