Bug: Fix imported Ghost blog post headings

[FuzzyMistborn]

Some of the blog posts imported from Ghost have bad headings (ie #H instead of # H. Below is a list of posts to be fixed:

• [x] https://github.com/FuzzyMistborn/blog/blob/main/content/post/2020/hardware/index.md
• [x] https://github.com/FuzzyMistborn/blog/blob/main/content/post/2020/software/index.md

[FuzzyMistborn]

Fixed via https://github.com/FuzzyMistborn/blog/commit/a0cb049a5e73a4198f73a7f48581aa25d0838180