build(deps): bump prismjs from 1.26.0 to 1.27.0 (vuepress#717)

Bumps [prismjs](https://github.com/PrismJS/prism) from 1.26.0 to 1.27.0.
- [Release notes](https://github.com/PrismJS/prism/releases)
- [Changelog](https://github.com/PrismJS/prism/blob/master/CHANGELOG.md)
- [Commits](PrismJS/prism@v1.26.0...v1.27.0)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

yarn.lock

@@ -8774,9 +8774,9 @@ pretty@2.0.0:
     js-beautify "^1.6.12"
 
 prismjs@^1.26.0:
-  version "1.26.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.26.0.tgz#16881b594828bb6b45296083a8cbab46b0accd47"
-  integrity sha512-HUoH9C5Z3jKkl3UunCyiD5jwk0+Hz0fIgQ2nbwU2Oo/ceuTAQAg+pPVnfdt2TJWRVLcxKh9iuoYDUSc8clb5UQ==
+  version "1.27.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.27.0.tgz#bb6ee3138a0b438a3653dd4d6ce0cc6510a45057"
+  integrity sha512-t13BGPUlFDR7wRB5kQDG4jjl7XeuH6jbJGt11JHPL96qwsEHNX2+68tFXqc1/k+/jALsbSWJKUOT/hcYAZ5LkA==
 
 process-nextick-args@~2.0.0:
   version "2.0.1"