Update README.md

For build badge use develop branch.

README.md

@@ -1,6 +1,6 @@
 [![cryptomator](cryptomator.png)](https://cryptomator.org/)
 
-[![Build](https://github.com/cryptomator/cryptomator/workflows/Build/badge.svg)](https://github.com/cryptomator/cryptomator/actions?query=workflow%3ABuild)
+[![Build](https://github.com/cryptomator/cryptomator/workflows/Build/badge.svg)](https://github.com/cryptomator/cryptomator/actions/workflows/build.yml?query=branch%3Adevelop)
 [![Known Vulnerabilities](https://snyk.io/test/github/cryptomator/cryptomator/badge.svg)](https://snyk.io/test/github/cryptomator/cryptomator)
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=cryptomator_cryptomator&metric=alert_status)](https://sonarcloud.io/dashboard?id=cryptomator_cryptomator)
 [![Mastodon](https://img.shields.io/mastodon/follow/176112?domain=mastodon.online&style=flat)](https://mastodon.online/@cryptomator)