build(deps): bump react-native-windows from 0.66.19 to 0.66.20 (#1579)

Bumps [react-native-windows](https://github.com/microsoft/react-native-windows/tree/HEAD/vnext) from 0.66.19 to 0.66.20.
- [Release notes](https://github.com/microsoft/react-native-windows/releases)
- [Changelog](https://github.com/microsoft/react-native-windows/blob/react-native-windows_v0.66.20/vnext/CHANGELOG.md)
- [Commits](https://github.com/microsoft/react-native-windows/commits/react-native-windows_v0.66.20/vnext)

---
updated-dependencies:
- dependency-name: react-native-windows
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

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

yarn.lock

@@ -12337,9 +12337,9 @@ react-native-test-app@^1.0.6:
     yargs "^16.0.0"
 
 react-native-windows@^0.66.0-0:
-  version "0.66.19"
-  resolved "https://registry.yarnpkg.com/react-native-windows/-/react-native-windows-0.66.19.tgz#319a186157ae191f3a07f53a515deb6555a3b10d"
-  integrity sha512-q1FvZSBt83BWYE9knAP4RYzzW59clpIvaOqlVRjkR3YHeWuswPacyL6O9cx37z7DbKMt/x+HExwGJEocscWYlQ==
+  version "0.66.20"
+  resolved "https://registry.yarnpkg.com/react-native-windows/-/react-native-windows-0.66.20.tgz#d2a8ce98f54d5e14cb77f1e41b45b30b2c507845"
+  integrity sha512-NsX7tPxOZUY5W+pUXi/3RvX4HzrMbOcE6mnilKK793rvMdWkSu5Ded6EK2U3xMKgXh8ta85KScYmw1FhWYMoTQ==
   dependencies:
     "@babel/runtime" "^7.0.0"
     "@jest/create-cache-key-function" "^27.0.1"