Bump prismjs from 1.23.0 to 1.25.0

Bumps [prismjs](https://github.com/PrismJS/prism) from 1.23.0 to 1.25.0.
- [Release notes](https://github.com/PrismJS/prism/releases)
- [Changelog](https://github.com/PrismJS/prism/blob/master/CHANGELOG.md)
- [Commits](PrismJS/prism@v1.23.0...v1.25.0)

---
updated-dependencies:
- dependency-name: prismjs
  dependency-type: direct:production
...

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

package.json

@@ -20,7 +20,7 @@
     "gatsby-source-filesystem": "2.3.19",
     "gatsby-transformer-remark": "2.8.25",
     "gatsby-transformer-sharp": "2.5.11",
-    "prismjs": "1.23.0",
+    "prismjs": "1.25.0",
     "prop-types": "15.7.2",
     "react": "16.13.1",
     "react-dom": "16.13.1",