Fixes inability to open channel details modal in new tab

[LianaHarris360]

Summary

This pr updates the url path to open the ChannelDetailsModal so that it opens in a new tab correctly. Fixes #4026

Description of the change(s) you made

• URL path changed from /public/:channelId to /public/:channelId/details

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Reviewer guidance

How can a reviewer test these changes?

1. While unauthenticated, view the public catalog page and open the channel details modal (via the info icon) in a new tab.
2. While authenticated, view the content library page and open the channel details modal (via the info icon) in a new tab.

References

Contributor's Checklist

PR process:

• If this is an important user-facing change, PR or related issue the CHANGELOG label been added to this PR. Note: items with this label will be added to the CHANGELOG at a later time
• If this includes an internal dependency change, a link to the diff is provided
• The docs label has been added if this introduces a change that needs to be updated in the user docs?
• If any Python requirements have changed, the updated requirements.txt files also included in this PR
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Studio-specifc:

• All user-facing strings are translated properly
• The notranslate class been added to elements that shouldn't be translated by Google Chrome's automatic translation feature (e.g. icons, user-generated text)
• All UI components are LTR and RTL compliant
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Testing:

• Code is clean and well-commented
• Contributor has fully tested the PR manually
• If there are any front-end changes, before/after screenshots are included
• Critical user journeys are covered by Gherkin stories
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• Critical and brittle code paths are covered by unit tests

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Reviewer's Checklist

This section is for reviewers to fill out.

• Automated test coverage is satisfactory
• PR is fully functional
• PR has been tested for accessibility regressions
• External dependency files were updated if necessary (yarn and pip)
• Documentation is updated
• Contributor is in AUTHORS.md

[akolson]

Thanks @LianaHarris360, the fix looks good to me, and also resolves the bug.