Add two pointers and sliding window pattern article

Author: ashishps1

README.md

@@ -39,10 +39,12 @@ This repository contains awesome LeetCode resources to learn Data Structures and
 ## 🚀 Patterns
 - [15 Leetcode Patterns](https://blog.algomaster.io/p/15-leetcode-patterns)
 - [Prefix Sum Pattern](https://blog.algomaster.io/p/f96dd3de-c89c-428e-a88d-b1f751a42a57)
+- [Two Pointers Pattern](https://blog.algomaster.io/p/69025a2e-b0d5-4705-8507-bba16c2691f1)
 - [Fast and Slow Pointers Pattern](https://blog.algomaster.io/p/7dcce8e9-beee-4fef-8874-7aae025031b1)
+- [Sliding Window Pattern](https://blog.algomaster.io/p/f4412a17-7a3a-4d0b-8e39-9ea8f429bf7c)
 - [Top 'K' Elements Pattern](https://blog.algomaster.io/p/322aac40-c4d0-4e54-980d-b22d9eeebca6)
-- [Monotonic Stack](https://blog.algomaster.io/p/5dabff21-11f4-470d-8e38-76ff07c63fdf)
-- [Overlapping Intervals](https://blog.algomaster.io/p/812e72f7-eced-4256-a4c1-00606ae50679)
+- [Monotonic Stack Pattern](https://blog.algomaster.io/p/5dabff21-11f4-470d-8e38-76ff07c63fdf)
+- [Overlapping Intervals Pattern](https://blog.algomaster.io/p/812e72f7-eced-4256-a4c1-00606ae50679)
 - [Tree Patterns](https://leetcode.com/discuss/study-guide/937307/Iterative-or-Recursive-or-DFS-and-BFS-Tree-Traversal-or-In-Pre-Post-and-LevelOrder-or-Views)
  - [Tree Iterative Traversal](https://medium.com/leetcode-patterns/leetcode-pattern-0-iterative-traversals-on-trees-d373568eb0ec)
  - [Tree Question Pattern](https://leetcode.com/discuss/study-guide/2879240/TREE-QUESTION-PATTERN-2023-oror-TREE-STUDY-GUIDE)