Change github reference to new repo

Updated GitHub link in sidenav buttons component.

Author: Ramboio

src/app/component/sidenav-buttons/sidenav-buttons.component.html

@@ -3,7 +3,7 @@
     <mat-icon mat-list-icon color="primary">{{ Icons[i] }}</mat-icon>
     <h3 mat-line>{{ Options[i] }}</h3>
   </a>
-  <a mat-list-item href="https://github.com/wurstbrot/DevSecOps-MaturityModel/" target="_blank">
+  <a mat-list-item href="https://github.com/devsecopsmaturitymodel/DevSecOps-MaturityModel/" target="_blank">
     <mat-icon mat-list-icon color="primary" svgIcon="github"></mat-icon>
     <h3 mat-line>GitHub</h3>
   </a>