Fix padding at bottom of email address in emails

[ghost]

All Submissions:

• [x] Have you followed the Classic Commerce Contributing guideline?
• [x] Does your code follow the repo standards?
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Changes proposed in this Pull Request:

A few small changes to fix the missing padding at the bottom of the shipping address in emails.

The fix was applied in WC 3.5.4 https://github.com/woocommerce/woocommerce/pull/22466

How to test the changes in this Pull Request:

1. Change the 2 lines in 2 files
2. Send through a test order
3. See the improved padding

Screenshot - before:

Screenshot - after:

Other information:

• [x] Have you added an explanation of what your changes do and why you'd like us to include them?
• [x] Have you written new tests for your changes, as applicable?
• [x] Have you successfully ran tests with your changes locally?
• [x] Have you included screenshots before/after your changes, if applicable?

[bahiirwa]

I was thinking we should take this a step further and introduce even boxes on both sides. CSS Flexbox/grid should do this easily. Thoughts??

[ghost]

Yes, that's fine with me. I was just doing what WC did, but it would look even better with same size boxes.