Correct about us page alignment and update the information and its navbar

[kashish-d]

Fix the alignment of the top section and some grammar improvements on the bottom section. Also, additional information can be added there.
Make the hamburger menu instead of a menu button.
Also change "Go to top" to a simple arrow icon

[attreyee-muk]

Hey! I want to work on this issue. Can you assign it to me?

[kashish-d]

Sure. Go ahead @a-muk