githubnext.github.io -> github.github.io

[pelikhan]

Update public documetation links

[Copilot]

Pull request overview

This PR updates public documentation links across the codebase, changing the domain from githubnext.github.io to github.github.io to reflect a new documentation hosting location.

Changes:

• Updated all documentation URLs from githubnext.github.io/gh-aw/ to github.github.io/gh-aw/
• Changes span social media content, markdown documentation, source code, configuration files, and test files

Reviewed changes

Copilot reviewed 73 out of 74 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
socials/published/*.json	Updated blog post URLs in published social media content for Twitter, Bluesky, Mastodon, and LinkedIn
socials/content/*.md	Updated blog URLs and documentation links in social media content templates
docs/src/content/docs/blog/*.md	Updated documentation and quick start links in blog posts
pkg/workflow/*.go	Updated documentation URLs in error messages and validation code
pkg/cli/*.go	Updated documentation links in CLI help text and templates
actions/setup/js/*.cjs	Updated documentation URLs in GitHub Actions JavaScript files
*.md documentation files	Updated documentation links in markdown files including guides, references, and setup instructions
*.json schema files	Updated documentation URLs in JSON schema comments and descriptions

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