simplified issue template

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.github/SUPPORT.md

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+# Support for Cryptomator
+
+For development-related topics, GitHub is the right place.
+
+For _everything else_, please visit our official [Cryptomator Community](https://community.cryptomator.org) (we are there, too :wink:). Amongst others, you will find:
+
+- [Knowledge Base](https://community.cryptomator.org/c/kb)
+  - Installation manuals
+  - Usage guides
+  - FAQ
+- [Help with problems](https://community.cryptomator.org/c/help)
+  - Assistance with the setup
+  - Known issues and workarounds
+  - Discussions about the apps
+- [Development discussions](https://community.cryptomator.org/c/development)
+  - General questions
+  - Discussions regarding our design decissions
+  - Our roadmap