chore(deps): bump prismjs in /packages/examples/example

Bumps [prismjs](https://github.com/PrismJS/prism) from 1.20.0 to 1.21.0.
- [Release notes](https://github.com/PrismJS/prism/releases)
- [Changelog](https://github.com/PrismJS/prism/blob/master/CHANGELOG.md)
- [Commits](https://github.com/PrismJS/prism/compare/v1.20.0...v1.21.0)

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

packages/examples/example/package.json

@@ -20,7 +20,7 @@
     "@material-ui/icons": "^4.9.1",
     "@material-ui/lab": "^v4.0.0-alpha.56",
     "pattern": "link:..",
-    "prismjs": "1.20.0",
+    "prismjs": "1.21.0",
     "react": "^16.13",
     "react-dom": "^16.13",
     "react-scripts": "^3.4.1",

packages/examples/example/yarn.lock

@@ -9229,7 +9229,7 @@ path-type@^4.0.0:
   integrity sha512-gDKb8aZMDeD/tZWs9P6+q0J9Mwkdl6xMV8TjnGP3qJVJ06bdMgkbBlLU8IdfOsIsFz2BW1rNVT3XuNEl8zPAvw==
 
 "pattern@link:..":
-  version "2.7.2"
+  version "2.8.1"
 
 pbkdf2@^3.0.3:
   version "3.0.17"
@@ -10056,10 +10056,10 @@ pretty-format@^24.9.0:
     ansi-styles "^3.2.0"
     react-is "^16.8.4"
 
-prismjs@1.20.0:
+prismjs@1.21.0:
-  version "1.20.0"
+  version "1.21.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.20.0.tgz#9b685fc480a3514ee7198eac6a3bf5024319ff03"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.21.0.tgz#36c086ec36b45319ec4218ee164c110f9fc015a3"
-  integrity sha512-AEDjSrVNkynnw6A+B1DsFkd6AVdTnp+/WoUixFRULlCLZVRZlVQMVWio/16jv7G1FscUxQxOQhWwApgbnxr6kQ==
+  integrity sha512-uGdSIu1nk3kej2iZsLyDoJ7e9bnPzIgY0naW/HdknGj61zScaprVEVGHrPoXqI+M9sP0NDnTK2jpkvmldpuqDw==
   optionalDependencies:
     clipboard "^2.0.0"