Rename About page section: Project Staff -> Project Members

frontend/src/app/components/about/about.component.html

@@ -178,7 +178,7 @@
     </div>
 
     <div class="maintainers" *ngIf="contributors.core.length">
-      <h3 i18n="about.project_staff">Project Staff</h3>
+      <h3 i18n="about.project_members">Project Members</h3>
       <div class="wrapper">
         <ng-template ngFor let-contributor [ngForOf]="contributors.core">
           <a [href]="'https://github.com/' + contributor.name" target="_blank" [title]="contributor.name">