check-model-has-description raises IsADirectoryError intermittently

[shippy]

Describe the bug
When running the pre-commit hook check-model-has-description with non-standard directory and target locations (greybox_conversion/transform and greybox_conversion/.meltano) errors out with a IsADirectoryError because it somehow picks up the target location for a source of YAML files, and then it's surprised when the target directory YAML file actually is a directory that contains the SQL for the tests defined in the project directory YAML file.

To Reproduce
Steps to reproduce the behavior:

1. Set up a dbt project in meltano_pipeline/transform
2. Set up a dbt target directory in meltano_pipeline/.meltano via DBT_TARGET_PATH
3. Set up pre-commit hook with the following definition:

   - id: check-model-has-properties-file
     files: ^meltano_pipeline/transform/models/
     args: [ --manifest, meltano_pipeline/.meltano/manifest.json ]

4. Set up a models/base/model.sql with models/base/model.yml file that contains at least one model test
5. Stage and run pre-commit

Expected behavior
This hook should only check against YAML files in the project directory.

Version:
v2.0.1

Additional context
Here's what the traceback looks like - most other hooks don't have this problem:

Check the model has properties file......................................Passed
Check the model has description..........................................Failed
- hook id: check-model-has-description
- exit code: 1

Traceback (most recent call last):
  File "/Users/simon/.cache/pre-commit/repojqwpib0c/py_env-python3.11/bin/check-model-has-description", line 8, in <module>
    sys.exit(main())
             ^^^^^^
  File "/Users/simon/.cache/pre-commit/repojqwpib0c/py_env-python3.11/lib/python3.11/site-packages/dbt_checkpoint/check_model_has_description.py", line 69, in main
    hook_properties = has_description(
                      ^^^^^^^^^^^^^^^^
  File "/Users/simon/.cache/pre-commit/repojqwpib0c/py_env-python3.11/lib/python3.11/site-packages/dbt_checkpoint/check_model_has_description.py", line 42, in has_description
    in_schemas = {
                 ^
  File "/Users/simon/.cache/pre-commit/repojqwpib0c/py_env-python3.11/lib/python3.11/site-packages/dbt_checkpoint/check_model_has_description.py", line 42, in <setcomp>
    in_schemas = {
                 ^
  File "/Users/simon/.cache/pre-commit/repojqwpib0c/py_env-python3.11/lib/python3.11/site-packages/dbt_checkpoint/utils.py", line 307, in get_model_schemas
    with open(yml_file, "r") as file:
         ^^^^^^^^^^^^^^^^^^^
IsADirectoryError: [Errno 21] Is a directory: 'greybox_conversion/.meltano/run/greybox_transformation/models/achievements/achievements.yml'

Check the model columns have description.............(no files to check)Skipped
Check the model has all columns in properties file...(no files to check)Skipped
Check that model has tests...............................................Passed

I tested whether including an exclude: ^meltano_pipeline/.meltano/.* would do anything, since my reading of the related hook suggested it might, but either I'm using an incorrect format or it doesn't work.