update readme for embedded debugging

[nilswiersma]

No description provided.

[saidelike]

Hi, thanks for this. Indeed the documentation lacks a bit of information. Your changes are not entirely true. What matters is that the closing brace } is indented if you make it multi-lines, e.g.:

[INIT]
context = {
    "pid": 100,
    "mappings": [
        [123, 456, 789, '/path/to/whatever']
    ]
  }

Also, I don't recall if there is a need for an empty line afterwards!?