Bump rollup in /examples/apollo-devtools-playground

Bumps [rollup](https://github.com/rollup/rollup) from 2.79.1 to 2.79.2.
- [Release notes](https://github.com/rollup/rollup/releases)
- [Changelog](https://github.com/rollup/rollup/blob/master/CHANGELOG.md)
- [Commits](rollup/rollup@v2.79.1...v2.79.2)

---
updated-dependencies:
- dependency-name: rollup
  dependency-type: indirect
...

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

Author: dependabot[bot]

examples/apollo-devtools-playground/yarn.lock

@@ -7656,9 +7656,9 @@ rollup-plugin-terser@^7.0.0:
     terser "^5.0.0"
 
 rollup@^2.43.1:
-  version "2.79.1"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.79.1.tgz#bedee8faef7c9f93a2647ac0108748f497f081c7"
-  integrity sha512-uKxbd0IhMZOhjAiD5oAFp7BqvkA4Dv47qpOCtaNvng4HBwdbWtdOh8f5nZNuk2rp51PMGk3bzfWu5oayNEuYnw==
+  version "2.79.2"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-2.79.2.tgz#f150e4a5db4b121a21a747d762f701e5e9f49090"
+  integrity sha512-fS6iqSPZDs3dr/y7Od6y5nha8dW1YnbgtsyotCVvoFGKbERG++CVRFv1meyGDE1SNItQA8BrnCw7ScdAhRJ3XQ==
   optionalDependencies:
     fsevents "~2.3.2"