fix(blog): drop duplicate h1 from hackathon winners post (#588)

BlogPostDetails already renders post.title from frontmatter as the
page heading above the cover banner, so the matching `#` heading at
the top of the MDX body rendered a second time directly under the
banner. Removing the body-level h1 keeps the page to a single title.

Author: Benjtalkshow

content/blog/boundless-trustless-work-hackathon-winners.mdx

@@ -23,8 +23,6 @@ seoTitle: 'Boundless x Trustless Work Hackathon Winners Announced'
 seoDescription: 'The winners of the Boundless x Trustless Work Hackathon: Conductor takes first place, with Crypt and GoPadi rounding out the podium and five honorable mentions on escrow-powered builds.'
 ---
 
-# Boundless x Trustless Work Hackathon: Winners and Recognitions
-
 Last week, we wrapped up four exciting days of building, collaboration, and innovation during the Boundless x Trustless Work Hackathon and now, the results are in.
 
 What started as a small hackathon aimed at improving our hackathon flow quickly turned into something much bigger. Builders from different tech backgrounds and countries came together to explore practical ways to implement [Trustless Work](https://www.trustlesswork.com/)'s escrow infrastructure, and the response exceeded our expectations with far more submissions than we anticipated.