SigmaRuleImporter error when saving KQL queries

When trying to export the KQL queries, the cell runs for a bit without a problem, and successfully outputs some of the KQL queries then it runs into this issue:

```
TypeError Traceback (most recent call last)
Cell In[22], line 7
4 sub_dir = root.joinpath(categ)
6 for file_name, contents in kql_files.items():
----> 7 kql_txt = contents[1]
8 if not kql_txt == NOT_CONVERTIBLE:
9 sub_dir.mkdir(exist_ok=True)

TypeError: 'WindowsPath' object is not subscriptable