fix: Update calendar.py dsid param

[seanson]

Fixes #330 with @zarkin404's work.

Proposed change

Adds a new required dsis parameter to some calendar calls.

Type of change

• [ ] Dependency upgrade
• [X] Bugfix (non-breaking change which fixes an issue)
• [ ] New service (thank you!)
• [ ] New feature (which adds functionality to an existing service)
• [ ] Breaking change (fix/feature causing existing functionality to break)
• [ ] Code quality improvements to existing code or addition of tests
• [ ] Documentation or code sample

Example of code:

from pyicloud import PyiCloudService

api = PyiCloudService('[email protected]')
api.calendar.events()

Additional information

• This PR fixes or closes issue: fixes #330
• This PR is related to issue: #330

Checklist

• [X] The code change is tested and works locally.
• [X] Local tests pass. Your PR cannot be merged unless tests pass
• [X] There is no commented out code in this PR.
• [ ] Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• [ ] Documentation added/updated to README