Dikshant Wavhule

fix(curriculum):explained the border-box property

5

Checklist: - [x] I have read and followed the [contribution guidelines](https://contribute.freecodecamp.org). - [x] I have read and followed the [how to open a pull request guide](https://contribute.freecodecamp.org/#/how-to-open-a-pull-request). - [x] My pull...

changed zIndex so that blocknote UI is above

1

Fixes #1 #changed Z index of sidebar BlockNote UI have z index of 300 and here "aside" had 99999 that is why the blocknote menu component was below the side...