readme: update hyperlinks

Xcom-Test-Loop-Program/readme.md

@@ -1,6 +1,6 @@
 
 [![](https://es-lab.de:60085/attachments/5a362329-e45e-40d0-a018-b7ddafd296f9)](https://www.hs-anhalt.de/startseite.html)
-### **Xcom-Test-Loop-Program** [![]( https://img.shields.io/badge/documentation-wiki-yellow.svg?style=plastic)](https://es-lab.de:60085/mueller_to/Xcom-API/wiki/Xcom-Test-Loop-Program)
+### **Xcom-Test-Loop-Program** [![]( https://img.shields.io/badge/documentation-wiki-yellow.svg?style=plain)](https://es-lab.de:60085/mueller_to/Xcom-API/wiki/Xcom-Test-Loop-Program)
 This program demonstrate the functionality of the Xcom_API-class. It sends permanently a request for a known object_id and display the answer from the Xtender-System. To use this program a Raspberry Pi with a Raspicomm extender module and a RS232-bridge called Xcom-232i is required.
 
 More information about the hardware-setup and the usage of the program you can find on the Wiki-Page.

Xcom-Test-Program/readme.md

@@ -1,5 +1,5 @@
 [![](https://es-lab.de:60085/attachments/5a362329-e45e-40d0-a018-b7ddafd296f9)](https://www.hs-anhalt.de/startseite.html)
-### **Xcom Test Program** [![]( https://img.shields.io/badge/documentation-wiki-yellow.svg?style=plastic)](https://es-lab.de:60085/mueller_to/Xcom-API/wiki/Xcom-Test-Program)
+### **Xcom Test Program** [![]( https://img.shields.io/badge/documentation-wiki-yellow.svg?style=plain)](https://es-lab.de:60085/mueller_to/Xcom-API/wiki/Xcom-Test-Program)
 This program demonstrate the functionality of the Xcom_API-class. To use this program a Raspberry Pi with a Raspicomm extender module and a RS232-bridge called Xcom-232i is required. 
 
 More information about the hardware-setup and the usage of the program you can find on the Wiki-Page.