Geo Replicables - Sentence casing

What does this MR do and why?

Closes #562177 (closed)

This change is a minor UX fix to adjust some of the casing used in the breadcrumbs and empty state. Per the issue and UX reviews:

1. Cleaned up the wording on the empty state title
2. Cleaned up the wording on the empty state description
3. Updated the link text Geo troubleshooting in empty state description to sentence case
4. Updated the breadcrumb for Geo sites to sentence case
5. Updated the page title for Geo replication to sentence case
6. Stuck with title case for the Registry names (ie CI Secure Files)

Screenshots or screen recordings

Before	After

How to set up and validate locally

Setup Geo (optional)

Important: To properly test Geo you will need a separate GDK setup. Setup is straightforward but takes some time. Another option is to validate the code functionally and if needed schedule a call to sync and I can screen share my instance.

1. Ensure no other GDKs are running. gdk stop/gdk kill
2. Open an empty directory and install and run Geo with the one-line command found on the Easy installation instructions
3. Access your primary and secondary Geo instances via 127.0.0.1:3000 and 127.0.0.1:3001.

Testing

1. Access your primary GDK Geo Page (127.0.0.1:3000/admin/geo)
2. Scroll down to the very bottom Replication details section
3. Click one of the blue links (ex: CI Secure Files)
4. If needed use the dropdown to find a list with 0 results
5. Ensure the breadcrumbs and empty state casing matches the goals of the MR/issue (sentence casing)

MR acceptance checklist

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Related to #562177 (closed)