Release: v3.6.0rc2 (#5386)

## What type of PR is this? (check all applicable)

Release

## Have you discussed this change with the InvokeAI team?
- [X] Yes
- [ ] No, because:

      
## Have you updated all relevant documentation?
- [X] Yes
- [ ] No


## Description
v3.6.0rc2 release

## Related Tickets & Documents

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## QA Instructions, Screenshots, Recordings
Test latest main & [Uploading
InvokeAI-installer-v3.6.0rc2.zip…](Installer zip)

## Merge Plan
PR can be merged immediately
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## Added/updated tests?

- [ ] Yes
- [X] No : _please replace this line with details on why tests
      have not been included_

## [optional] Are there any post deployment tasks we need to perform?
Publish release on PyPI and GitHub

invokeai/version/invokeai_version.py

@@ -1 +1 @@
-__version__ = "3.6.0rc1"
+__version__ = "3.6.0rc2"