Fix incorrect outputs for Linked List Miscellaneous : 3 MQ (Pair-wise Swap)

[bhuvitw]

📌 Summary

This PR corrects the expected answers for the Linked List Miscellaneous : 3 problem.
The question code performs pair-wise value swapping, not mirroring or reversing.

Code Logic Referenced

p = head;
q = head->next;
while (q != null) {
   swap(p->value, q->value);
   p = q->next;
   q = p->next;
}

This swaps (node1,node2), (node3,node4), ...

---

✅ Correct Answers

Input	Correct Output
1 2 3 4 5 6	2 1 4 3 6 5
1 1 2 2 3 3	1 1 2 2 3 3
1 1 1 2 2 2	1 1 2 1 2 2

---

❌ Previously Incorrect Answers

Input	Shown Output (Wrong)
1 2 3 4 5 6	1 3 5 5 3 1
1 1 2 2 3 3	1 2 3 3 2 1
1 1 1 2 2 2	1 1 2 2 1 1

These correspond to reverse-pair or mirrored output, not the given code behavior.

---

📁 File Reference

Advance Data Structures_03-12-2024/8) Linked Lists/15) Linked List Miscellaneous - 1/Answer.txt

---

🎯 Why this fix

The current answers do not match the algorithm.
Updated results reflect the accurate pair-wise swap behavior.

---

Please review and merge.