v4.3.1 Bugfix release

What's Changed

• [BUGFIX] Fix docs by @lukaszuznanski in #728, #730
• [BUGFIX] Fix linkResult configuration in simplified file output by @dvdmlln in #731
• [TASK] Align default typoscript constants by @twoldanski in #733
• [BUGFIX] Align empty values to null instead of empty string as legacy… by @twoldanski in #732
• [BUGFIX] Make processing PDF/SVG files optional by @twoldanski in #736
• [DOCS] Mention XML sitemap configuration by @kitzberger in #735

Full Changelog: v4.3.0...v4.3.1