style: fix linting issues met Prettier

backend/src/entities/assignments/group.entity.ts

@@ -4,12 +4,21 @@ import { Student } from '../users/student.entity.js';
 
 @Entity()
 export class Group {
-    @ManyToOne({ entity: () => {return Assignment}, primary: true })
+    @ManyToOne({
+        entity: () => {
+            return Assignment;
+        },
+        primary: true,
+    })
     assignment!: Assignment;
 
     @PrimaryKey({ type: 'integer' })
     groupNumber!: number;
 
-    @ManyToMany({ entity: () => {return Student} })
+    @ManyToMany({
+        entity: () => {
+            return Student;
+        },
+    })
     members!: Student[];
 }