style(frontend): Bring back white chip buttons after angular material 20 changed their color

Author: nevio18324

frontend/src/app/shared/filter/team-filter/team-filter.component.scss

@@ -1,3 +1,10 @@
 .chip-team-name {
   max-width: 80px;
 }
+
+.mat-mdc-standard-chip {
+  background-color: rgb(255, 255, 255) !important;
+}
+.mat-mdc-chip-highlighted {
+  background-color: rgb(30, 90, 150) !important;
+}