fixed header in release post

[crisgarner]

Description

Fixed typo in blog post

Confirmation

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• I have read and understand MACI's GitHub processes.
• I have read and understand MACI's testing guide.

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[kittybest]

Actually I am also fixing docs in PR #942 , but this could be merged first :)

[ctrlc03]

uld be merged first :)

Description

Fixed typo in blog post

Confirmation

• I have read and understand MACI's contributor guidelines and code of conduct.
• I have read and understand MACI's GitHub processes.
• I have read and understand MACI's testing guide.

@crisgarner When pushing commits to MACI, please use conventional commits syntax, you can run npm run commit from the root of the monorepo, this will guide you through the commit process and produce a valid commit message. Given we already have to force push to rebase this PR, you could run git commit --amend and manually change the commit message (smth like docs(blog-post): [...])

[ctrlc03]

Thanks!

[samajammin]

Nice catch 👍