Fix broken TestBed chaining in example-extensions specs (#5446)

Four demo-extension specs had a stray comma after configureTestingModule
(`}),` then `.compileComponents()`), a pre-existing TS6.0 syntax error
(TS1109) that surfaced once the toolchain stopped tolerating it. Drop the
comma so the .compileComponents() call chains correctly.

These specs are demo extensions: not in the production ng build nor the
vitest test projects, so they did not block the gate — but they should
still parse.

Author: nabramovitz

src/frontend/packages/example-extensions/src/acme-login/acme-login.component.spec.ts

@@ -24,7 +24,7 @@ describe('AcmeLoginComponent', () => {
         RouterTestingModule,
         NoopAnimationsModule,
       ]
-    }),
+    })
       .compileComponents();
   });
 

src/frontend/packages/example-extensions/src/acme-support-info/acme-support-info.component.spec.ts

@@ -18,7 +18,7 @@ describe('AcmeSupportInfoComponent', () => {
         CoreModule,
         SharedModule,
       ]
-    }),
+    })
     .compileComponents();
   });
 

src/frontend/packages/example-extensions/src/app-action-extension/app-action-extension.component.spec.ts

@@ -22,7 +22,7 @@ describe('AppActionExtensionComponent', () => {
         SharedModule,
         createBasicStoreModule(),
       ]
-    }),
+    })
     .compileComponents();
   });
 

src/frontend/packages/example-extensions/src/app-tab-extension/app-tab-extension.component.spec.ts

@@ -22,7 +22,7 @@ describe('AppTabExtensionComponent', () => {
         SharedModule,
         createBasicStoreModule(),
       ]
-    }),
+    })
     .compileComponents();
   });