Bump rehype-mermaid from 2.1.0 to 3.0.0

Bumps [rehype-mermaid](https://github.com/remcohaszing/rehype-mermaid) from 2.1.0 to 3.0.0.
- [Release notes](https://github.com/remcohaszing/rehype-mermaid/releases)
- [Commits](remcohaszing/rehype-mermaid@v2.1.0...v3.0.0)

---
updated-dependencies:
- dependency-name: rehype-mermaid
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Diff for: gatsby-theme-doctocat-typescript/package.json

@@ -77,7 +77,7 @@
     "react-use-flexsearch": "^0.1.1",
     "read-pkg-up": "^11.0.0",
     "rehype-mdx-code-props": "^3.0.1",
-    "rehype-mermaid": "^2.1.0",
+    "rehype-mermaid": "^3.0.0",
     "remark-flexible-code-titles": "^1.1.4",
     "remark-frontmatter": "^5.0.0",
     "remark-gemoji": "^8.0.0",