Update README.md

Author: Adnan Ahmed

README.md

@@ -6,7 +6,7 @@
 ## Table of Contents
  1. [Bash Basics](#1-bash-basics) 
  1.1. [File Operations](#11-file-operations) 
- 1.2. [Text Operations](#12-file-operations) 
+ 1.2. [Text Operations](#12-text-operations) 
  1.3. [Directory Operations](#13-directory-operations) 
  1.4. [SSH, System Info & Network Operations](#14-ssh-system-info--network-operations) 
  1. [Basic Shell Programming](#2-basic-shell-programming)