Update fairscale version

[four4fish]

What does this PR do?

Part of #11207
The change in fairscale side released in 0.4.5, upgrade lightning dependence version to 0.4.5 too

Fixes #<issue_number>

Does your PR introduce any breaking changes? If yes, please list them.

Before submitting

• Was this discussed/approved via a GitHub issue? (not for typos and docs)
• Did you read the contributor guideline, Pull Request section?
• Did you make sure your PR does only one thing, instead of bundling different changes together?
• Did you make sure to update the documentation with your changes? (if necessary)
• Did you write any new necessary tests? (not for typos and docs)
• Did you verify new and existing tests pass locally with your changes?
• Did you list all the breaking changes introduced by this pull request?
• Did you update the CHANGELOG? (not for typos, docs, test updates, or internal minor changes/refactorings)

PR review

Anyone in the community is welcome to review the PR.
Before you start reviewing make sure you have read Review guidelines. In short, see the following bullet-list:

• Is this pull request ready for review? (if not, please submit in draft mode)
• Check that all items from Before submitting are resolved
• Make sure the title is self-explanatory and the description concisely explains the PR
• Add labels and milestones (and optionally projects) to the PR so it can be classified

Did you have fun?

Make sure you had fun coding 🙃

[carmocca]

Hi @four4fish! I had #11478 already open but its fine, I'll close mine 😃

This is currently blocked by #11566

[four4fish]

Hi @four4fish! I had #11478 already open but its fine, I'll close mine 😃

This is currently blocked by #11566

@carmocca sorry i didn't see you already have one open, that works, thank you! :)