[DOCS] Update architecture diagram + fix docs links

[soapy1]

Description

This PR:

• adds a few notes to the conda store architecture diagram
• fixes a broken link in the docs
• fixes some grammer

Pull request checklist

• Did you test this change locally?
• Did you update the documentation (if required)?
• Did you add/update relevant tests for this change (if required)?

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[peytondmurray]

Looks good. The new diagram is significantly smaller, but if it ends up being too small when rendered into the docs, we can change it later.