Hosting and collection id documentation

[emma-steuer]

Related Issue(s):

Closes #

Proposed Changes:

For inclusion in changelog (if applicable):

1. N/A

Not intended for changelog:

1. Documentation for Subscriptions CLI has been updated to include hosting block use.

Diff of User Interface

Old behavior: N/A

New behavior: N/A

PR Checklist:

• This PR is as small and focused as possible
• If this PR includes proposed changes for inclusion in the changelog, the title of this PR summarizes those changes and is ready for inclusion in the Changelog.
• I have updated docstrings for function changes and docs in the 'docs' folder for user interface / behavior changes
• This PR does not break any examples or I have updated them

(Optional) @mentions for Notifications: