Bump @types/jest in /graylog2-web-interface/packages/jest-preset-gray…

…log (#10279)

Bumps [@types/jest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/jest) from 26.0.20 to 26.0.21.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/jest)

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graylog2-web-interface/packages/jest-preset-graylog/package.json

@@ -21,7 +21,7 @@
     "@testing-library/jest-dom": "5.11.9",
     "@testing-library/react": "11.2.5",
     "@types/enzyme": "3.10.8",
-    "@types/jest": "26.0.20",
+    "@types/jest": "26.0.21",
     "babel-jest": "^26.6.3",
     "enzyme": "3.11.0",
     "enzyme-adapter-react-16": "^1.15.2",