model with id on name don't generate markdown docs

[maryliag]

Describe the bug
When a model has a number on its id, the update markdown command doesn't work. It doesn't return any error, it just doesn't update the file.

To Reproduce
Example that doesn't work:
yaml file

- id: metric.namewithnumber1
    type: metric
    metric_name: namewithnumber1

readme file

<!-- semconv metric.namewithnumber1(metric_table) -->
<!-- endsemconv -->

Example that works:
yaml file

- id: metric.namewithnumber
    type: metric
    metric_name: namewithnumber1

readme file

<!-- semconv metric.namewithnumber(metric_table) -->
<!-- endsemconv -->

Expected behavior
Doc to be generated correctly or if there is a problem with the id name it should show some error message.