Default text in skills drop down should be "Type to add a skill..."

[sdgun]

Steps
Go to https://onboarding.topcoder-dev.com/onboarding/skills
See the default text in skills drop down

Default text in skills drop down should be "Type to add a skill..." as per figma

[suppermancool]

@jmgasper done in #693

[jmgasper]

@sdgun - Ready for testing

[sdgun]

Verified in Dev, issue is fixed.