Bump @types/react-dom from 16.9.6 to 16.9.8 (mui#1809)

Bumps [@types/react-dom](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/react-dom) from 16.9.6 to 16.9.8.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/react-dom)

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

Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

lib/package.json

@@ -86,7 +86,7 @@
     "@types/luxon": "^1.11.0",
     "@types/prop-types": "^15.5.8",
     "@types/react": "^16.8.2",
-    "@types/react-dom": "^16.9.6",
+    "@types/react-dom": "^16.9.8",
     "@types/react-transition-group": "^4.2.4",
     "@typescript-eslint/eslint-plugin": "^1.6.0",
     "@typescript-eslint/parser": "^1.6.0",

yarn.lock

@@ -2728,10 +2728,10 @@
   resolved "https://registry.yarnpkg.com/@types/prop-types/-/prop-types-15.7.3.tgz#2ab0d5da2e5815f94b0b9d4b95d1e5f243ab2ca7"
   integrity sha512-KfRL3PuHmqQLOG+2tGpRO26Ctg+Cq1E01D2DMriKEATHgWLfeNDmq9e29Q9WIky0dQ3NPkd1mzYH8Lm936Z9qw==
 
-"@types/react-dom@^16.9.6":
-  version "16.9.6"
-  resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-16.9.6.tgz#9e7f83d90566521cc2083be2277c6712dcaf754c"
-  integrity sha512-S6ihtlPMDotrlCJE9ST1fRmYrQNNwfgL61UB4I1W7M6kPulUKx9fXAleW5zpdIjUQ4fTaaog8uERezjsGUj9HQ==
+"@types/react-dom@^16.9.8":
+  version "16.9.8"
+  resolved "https://registry.yarnpkg.com/@types/react-dom/-/react-dom-16.9.8.tgz#fe4c1e11dfc67155733dfa6aa65108b4971cb423"
+  integrity sha512-ykkPQ+5nFknnlU6lDd947WbQ6TE3NNzbQAkInC2EKY1qeYdTKp7onFusmYZb+ityzx2YviqT6BXSu+LyWWJwcA==
   dependencies:
     "@types/react" "*"