Tweak blog title design mainly for mobile

Why is this change being made?

On mobile the blog became harder to read at the first glance. In some cases, a blog title is not rendered in the first view after !77693 (merged).

Tweak blog title design by removal of paddings.

before	after

Fixed up !77693 (merged)

Related to gitlab-com/marketing/digital-experience/buyer-experience#1014 (closed)

Author Checklist

• Provided a concise title for this Merge Request (MR)
• Added a description to this MR explaining the reasons for the proposed change, per say why, not just what
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