Update CHANGELOG.md

Author: adlk

Diff for: CHANGELOG.md

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+# [5.7.0-beta.1](https://github.com/meetfranz/franz/compare/v5.6.0...v5.7.0-beta.1) (2021-06-07)
+
+### Features
+
+* **App:** Add support for screen sharing during video calls
+
+### Bug Fixes
+
+* **App:** Fix app focus detection ([c42337f](https://github.com/meetfranz/franz/commit/c42337f))
+* **App:** Various bugfixes and improvements
+
+### General
+
+* **App:** Update electron to 12.0.6
+* **Translations:** Improved translations. **[A million thanks to the amazing community. 🎉](http://i18n.meetfranz.com/)**
+
+
+
 # [5.6.0](https://github.com/meetfranz/franz/compare/v5.6.0-beta.1...v5.6.0) (2020-11-13)