rel="noopener noreferrer" is missing from social icons and YouTube icon doesn't even have target="_blank"

Problem: 
All the social icons in the hero section are missing rel="noopener noreferrer" for external link redirection. 
But YouTube icon in Hero-section is missing both target="_blank" rel="noopener noreferrer"
Mail icon in Footer is missing both target="_blank" rel="noopener noreferrer"

Solution: Fix these issues by adding them.