Release v0.23.0-rc1 (#5891)

# Description

version change to trigger v0.23.0-rc1 release candidate

## Type of change

- This pull request is a minor refactor, code cleanup, test improvement,
or other maintenance task and doesn't change the functionality of Radius
(issue link optional).

## Auto-generated summary

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### <samp>🤖 Generated by Copilot at cd9afe0</samp>

### Summary
🚀📝🔖

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1. 🚀 - This emoji conveys the idea of launching a new release candidate
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It also implies excitement and anticipation for the upcoming features
and improvements that the release candidate offers.
2. 📝 - This emoji indicates that the change involved updating a document
or a configuration file, which is a common and important task for
maintaining the project. It also suggests clarity and precision, as the
`latest` key needs to match the exact version number of the release
candidate.
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organization and categorization, as the release candidate version
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Updated the `latest` version of radius to `v0.23.0-rc1` in the
`versions.json` file. This prepares the project for testing and
releasing the new candidate version.

> _`latest` key changed_
> _`v0.23.0-rc1` is ready_
> _autumn of testing_

### Walkthrough
* Update the latest version to `v0.23.0-rc1` in `versions.json`
([link](https://github.com/project-radius/radius/pull/5891/files?diff=unified&w=0#diff-2b39d33506bc7a34cef4b9ebf4cf8b1e3a5532f2131ceb37011b94261cec5f8cL7-R7))

---------

Co-authored-by: Vishwanath Hiremath <[email protected]>

versions.json

@@ -4,7 +4,7 @@
     "description": "stable is the release that we want to be the default version for users"
   },
   "latest": {
-    "version": "v0.22.0-rc2",
+    "version": "v0.23.0-rc1",
     "description": "latest is the most recent release, which may be a pre-release"
   }
 }