Fixed the Inconsistent Gift Options checkbox labels #9421

[vpiyappan]

Changed small "gift options" to "Gift Options" for Multisipping
address.

Description

Fixed the Inconsistent Gift Options checkbox labels #9421
Changed the labels "gift options" to "Gift Options" in both CSV file ("app\code\Magento\GiftMessage\i18n\en_US.csv") and phtml file ("app\code\Magento\GiftMessage\view\frontend\templates\inline.phtml")

Fixed Issues (if relevant)

1. Inconsistent Gift Options checkbox labels #9421: Inconsistent Gift Options checkbox labels
   

2. ...

Manual testing scenarios

1. Add product to cart with gift options enabled.
2. Add Gift message in cart page.
3. Click "Multishipping Checkout" from cart page.
4. You can find all the Labels listed along with checkbox "Gift Options" all are consistent

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)

[ishakhsuvarov]

@vpiyappan
Hi, please accept the CLA so that we can proceed with the merge of your PR.
You should have an email address used in the commit linked to your github account to do that
Thanks.

[miguelbalparda]

@vpiyappan were you able to review and sign the CLA? This is ready to be merged once it is signed.