build(deps): bump gatsby-remark-prismjs from 3.4.1 to 3.4.4 (#571)

Bumps [gatsby-remark-prismjs](https://github.com/gatsbyjs/gatsby/tree/HEAD/packages/gatsby-remark-prismjs) from 3.4.1 to 3.4.4.
- [Release notes](https://github.com/gatsbyjs/gatsby/releases)
- [Changelog](https://github.com/gatsbyjs/gatsby/blob/master/packages/gatsby-remark-prismjs/CHANGELOG.md)
- [Commits](https://github.com/gatsbyjs/gatsby/commits/gatsby-remark-prismjs@3.4.4/packages/gatsby-remark-prismjs)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

package.json

@@ -22,7 +22,7 @@
     "gatsby-plugin-typescript": "^2.3.1",
     "gatsby-remark-autolink-headers": "^2.2.1",
     "gatsby-remark-images": "^3.2.2",
-    "gatsby-remark-prismjs": "^3.4.1",
+    "gatsby-remark-prismjs": "^3.4.4",
     "gatsby-source-filesystem": "^2.2.2",
     "gatsby-transformer-remark": "^2.7.1",
     "intersection-observer": "^0.7.0",