boot-qemu.py: Use unpacking instead of concatentation

Clears up ruff warning:

  boot-qemu.py:700:23: RUF005 [*] Consider `[qemu, *qemu_args]` instead of concatenation

Signed-off-by: Nathan Chancellor <nathan@kernel.org>

Author: nathanchance

boot-qemu.py

@@ -694,7 +694,7 @@ def get_qemu_args(cfg):
     # with subprocess.Popen()
     qemu = shutil.which(qemu)
 
-    cfg["qemu_cmd"] = [qemu] + qemu_args
+    cfg["qemu_cmd"] = [qemu, *qemu_args]
 
     return cfg