v3.3.0 -- docfx 2.76.0, infra upgrades

What's Changed

• Update to docfx 2.76.0 by @Arhell in #51
  • docfx release notes: https://github.com/dotnet/docfx/releases/tag/v2.76.0
• Update actions/checkout action to v4 by @renovate in #47
• Update docker/build-push-action digest to 2a53c6c by @renovate in #49
• Update docker/metadata-action digest to f7b4ed1 by @renovate in #45
• Update docker/setup-buildx-action digest to 5138f76 by @renovate in #46
• Update docker/login-action digest to 70fccc7 by @renovate in #48

Full Changelog: v3.2.0...v3.3.0