Change scarb version to latest for docs generation pipeline (#2784)

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Closes #2607 

## Introduced changes

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-

## Checklist

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- [x] Linked relevant issue
- [x] Updated relevant documentation
- [x] Added relevant tests
- [x] Performed self-review of the code
- [x] Added changes to `CHANGELOG.md`

Author: kkawula

.github/workflows/docs.yml

@@ -50,7 +50,7 @@ jobs:
       - name: Install Scarb
         uses: software-mansion/setup-scarb@v1
         with:
-          scarb-version: nightly
+          scarb-version: latest
       - name: Generate and build snforge_std docs
         run: |
           scarb doc