LIBDRUM-1005. Fix ESLint "no-floating-promises" warning

Added "void" to "initTestBed" to fix a "no-floating-promises" warning
from ESLint.

This is okay, because the "initTestBed" function is only used within
a "waitForAsync" block, which ensures that the promise is awaited and
completed. Adding "void" signals to ESLint that Promise is intentionally
not being awaited (as it is handled by "waitForAsync").

Co-authored-by: Perplexity AI <noreply@perplexity.ai>
https://umd-dit.atlassian.net/browse/LIBDRUM-1005

Author: dsteelma-umd

src/app/restricted-access/restricted-access.component.spec.ts

@@ -95,7 +95,7 @@ describe('RestrictedAccessComponent', () => {
   }
 
   function initTestBed() {
-    TestBed.configureTestingModule({
+    void TestBed.configureTestingModule({
       imports: [
         TranslateModule.forRoot(),
         RestrictedAccessComponent,