DFG Viewer 6.1.2

What's Changed

• [MAINTENANCE] Remove duplicated assignment of double page by @beatrycze-volk in #312
• Revert "[BUGFIX] Display labels for document types in ToC plugin" by @beatrycze-volk in #313
• [MAINTENANCE] Deploy documentation to GitHub Pages by @markusweigelt in #314
• [BUGFIX] Update documentation.yml by @markusweigelt in #316
• [MAINTENANCE] Update versions for update to 6.1.2 by @beatrycze-volk in #318

Full Changelog: v6.1.1...v6.1.2