build(deps-dev): bump prettier from 2.8.4 to 2.8.7

Bumps [prettier](https://github.com/prettier/prettier) from 2.8.4 to 2.8.7.
- [Release notes](https://github.com/prettier/prettier/releases)
- [Changelog](https://github.com/prettier/prettier/blob/main/CHANGELOG.md)
- [Commits](prettier/prettier@2.8.4...2.8.7)

---
updated-dependencies:
- dependency-name: prettier
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -104,7 +104,7 @@
     "postcss-syntax": "0.36.2",
     "postcss-url": "10.1.3",
     "postcss-values-parser": "6.0.2",
-    "prettier": "2.8.4",
+    "prettier": "2.8.7",
     "raw-loader": "4.0.2",
     "react-markdown": "8.0.4",
     "react-syntax-highlighter": "15.5.0",