Bring some space between footer-buttons

src/app/components/shared/footer/footer.component.html

 <footer>
   <mat-toolbar>
     <button mat-button (click)="navToBlog()">Blog</button>
+    <span class="fill-remaining-space"></span>
     <button mat-button (click)="navToDSGVO()">DSGVO</button>
+    <span class="fill-remaining-space"></span>
     <button mat-button (click)="navToImprint()">Impressum</button>
   </mat-toolbar>
 </footer>