Update readme.md

Author: bhas

javascript1/week4/readme.md

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 For this session, we will reinforce the fundamental concepts of JavaScript covered in the past three weeks. You will gain extensive hands-on experience through various exercises.
 
 #### JavaScript Basics
-[Week 1](/javascript1/week1/readme.md):
 - [ ] Variables
 - [ ] Types
 - [ ] Operators
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-[Week 2](/javascript1/week2/readme.md):
 - [ ] Conditionals
 - [ ] Functions
 - [ ] Scopes 
 - [ ] For loops
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-[Week 3](/javascript1/week3/readme.md):
 - [ ] Arrays
 - [ ] Objects