MWPW-154535 fix padding columns

[vhargrave]

Fix issues reported during testing.

Resolves: MWPW-154535

Test URLs:
Padding under the columns centered wasn't quite right
Before: https://main--express-milo--adobecom.hlx.page/express/
After: https://mwpw-154535-fixes-sprint6--express-milo--adobecom.hlx.live/kr/express/create/advertisement

The issue that was reported here was that images on the blog pages were aligned left, but these issues were all fixed with the work on blog.
Before: https://main--express-milo--adobecom.hlx.page/express/learn/blog/social-media-branding-strategy
After: https://mwpw-154535-fixes-sprint6--express-milo--adobecom.hlx.page/express/learn/blog/social-media-branding-strategy

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Commits

• 32e3fdc ✅ (latest)

[aem-code-sync]

Page	Scores	Audits
/kr/express/create/advertisement
/express/learn/blog/social-media-branding-strategy

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 58.21%. Comparing base (ce00c46) to head (32e3fdc).

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #44   +/-   ##
=======================================
  Coverage   58.21%   58.21%           
=======================================
  Files          23       23           
  Lines        3769     3769           
=======================================
  Hits         2194     2194           
  Misses       1575     1575           

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