chore(ci): update GitHub Actions and Ruby version

[ViktorSvertoka]

1. Updated GitHub Actions versions:

actions/checkout@v2 → actions/checkout@v4

actions/upload-artifact@v2 → actions/upload-artifact@v4

Updated Ruby version from 2.6 to 3.2 (since 2.6 is no longer supported).

2. Optimized workflow steps:

Moved setup-ruby after checkout for better execution order.

Added bundler-cache: true to setup-ruby to prevent redundant gem installations.

3. Improved awesome_bot installation:

Added --no-document flag to speed up installation.

4. Made validation step more resilient:

Added continue-on-error: true to validate to prevent workflow failure on link errors.

5. Adjusted artifact handling: Used if: ${{ failure() }} to ensure artifacts are uploaded only if the validation fails.

Checklist:

• I've read and understood Contributing Guidelines.
• I've added the new resource at the end of its section.
• This resource is out there for a while, and actively maintained.
• This resource is popular enough and has at least a few hundred stars on GitHub.

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[ViktorSvertoka]

I’ve updated the workflow according to the @actions/upload-artifact documentation, which can be found here.

[gokaygurcan]

Thanks!