fix(effects): update ng-add schematic to use inject function (#5141)

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: timdeschryver

modules/effects/schematics/ng-add/files/__name@dasherize@if-flat__/__name@dasherize__.effects.spec.ts.template

@@ -1,4 +1,4 @@
-import { TestBed, inject } from '@angular/core/testing';
+import { TestBed } from '@angular/core/testing';
 import { provideMockActions } from '@ngrx/effects/testing';
 import { Observable } from 'rxjs';
 

modules/effects/schematics/ng-add/files/__name@dasherize@if-flat__/__name@dasherize__.effects.ts.template

@@ -1,7 +1,7 @@
-import { Injectable } from '@angular/core';
+import { inject, Injectable } from '@angular/core';
 import { Actions, createEffect } from '@ngrx/effects';
 
 @Injectable()
 export class <%= classify(name) %>Effects {
-  constructor(private actions$: Actions) {}
+  private actions$ = inject(Actions);
 }