fix : Change twitter icon to new one 'X'

[maheshsvm]

Description :
Twitter icon is changed from a Bird to 'X'

Steps to Reproduce :
1 . Go to https://gruntjs.com/
2. Scroll down to "Who uses Grunt" section in homepage
3. See old twitter icon

[Jitisha-khede]

hi!
i want to work on this issue
i am a beginner so I think i can resolve this
but i am not able to find the file where to make changes can you please help me?

[Sugamgoel28]

Hello, I would like to work on this issue, Could you please assign it to me?

[sushilmagare10]

Hello Can i work on this @maheshsvm

[teahsea]

Hey, i would like to work on this, thanks!

[artbindu]

This issue already resolved in PR- !222

This is current changes

May be wait for review & deployment