improve website and e-mail in readme

README.md

@@ -37,11 +37,11 @@ Put the PCB in the Case and screw it together.
 ![tools](/tools.txt)
 
 # Contact
-[https://oskar.ddns.mobi](https://oskar.ddns.mobi)
-Johannes Strelka-Petz <johannes_at_oskar.ddns.mobi>
+[https://oskars.org](https://oskars.org)
+Johannes Strelka-Petz <johannes_at_oskars.org>
 
 # Copyright & License
-    SPDX-FileCopyrightText: 2020 Johannes Strelka-Petz <johannes_at_oskar.ddns.mobi>
+    SPDX-FileCopyrightText: 2020 Johannes Strelka-Petz <johannes_at_oskars.org>
     SPDX-License-Identifier: CERN-OHL-S-2.0+
     ------------------------------------------------------------------------------
     | Copyright Johannes Strelka-Petz 2020.                                        |