Update Resources.md with Stack and Heap links

Added resources for Stack and Heap data structures, including videos and links.

Author: Dheeraj-06

Problems/Data-structures/Day-04/Resources.md

@@ -1,4 +1,20 @@
+Recommended for freshers. (Only how to use them, implementation will be covered in your dsa course)
+
+COMPLETE STL
+
+video: [https://www.youtube.com/watch?v=RRVYpIET_RU]
+
+1. STACK
+
 [https://www.programiz.com/cpp-programming/stack]
+
 [https://www.youtube.com/watch?v=WK97Pj0wa7A&list=PL1w8k37X_6L9NXrP1D31hDTKcdAPIL0cG&index=10]
 
-Recommended for freshers.
+2. HEAP
+
+[https://www.programiz.com/cpp-programming/priority-queue]
+
+[https://www.youtube.com/watch?v=WhIcVlkZ19s&list=PL1w8k37X_6L9NXrP1D31hDTKcdAPIL0cG&index=12]
+
+
+