Malformed error on motd rendering for json

[bortok]

Adding the following string to a topology causes motd rendering error:

  "oob": false,

nrx --input cyjs --file nrx/tests/site1/data/site1.cyjs --output air -T ./templates -D ~/tmp/dot
Reading platform map from: platform_map.yaml
Reading CYJS topology graph: nrx/tests/site1/data/site1.cyjs
Created air topology: /Users/xxx/tmp/dot/site1.air.json
Traceback (most recent call last):
  File "/Users/xxx/.venv/nrx310/bin/nrx", line 8, in <module>
    sys.exit(main())
  File "/Users/xxx/.venv/nrx310/lib/python3.10/site-packages/nrx/__init__.py", line 27, in main
    return cli()
  File "/Users/xxx/.venv/nrx310/lib/python3.10/site-packages/nrx/nrx.py", line 1326, in cli
    topo.export_topology()
  File "/Users/xxx/.venv/nrx310/lib/python3.10/site-packages/nrx/nrx.py", line 710, in export_topology
    self._render_topology()
  File "/Users/xxx/.venv/nrx310/lib/python3.10/site-packages/nrx/nrx.py", line 905, in _render_topology
    self._print_motd(topo)
  File "/Users/xxx/.venv/nrx310/lib/python3.10/site-packages/nrx/nrx.py", line 931, in _print_motd
    topo_dict = ast.literal_eval(topo)
  File "/usr/local/Cellar/python@3.10/3.10.14_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ast.py", line 110, in literal_eval
    return _convert(node_or_string)
  File "/usr/local/Cellar/python@3.10/3.10.14_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ast.py", line 99, in _convert
    return dict(zip(map(_convert, node.keys),
  File "/usr/local/Cellar/python@3.10/3.10.14_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ast.py", line 109, in _convert
    return _convert_signed_num(node)
  File "/usr/local/Cellar/python@3.10/3.10.14_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ast.py", line 83, in _convert_signed_num
    return _convert_num(node)
  File "/usr/local/Cellar/python@3.10/3.10.14_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ast.py", line 74, in _convert_num
    _raise_malformed_node(node)
  File "/usr/local/Cellar/python@3.10/3.10.14_1/Frameworks/Python.framework/Versions/3.10/lib/python3.10/ast.py", line 71, in _raise_malformed_node
    raise ValueError(msg + f': {node!r}')
ValueError: malformed node or string on line 3: <ast.Name object at 0x1049af430>