build(deps-dev): bump concurrently from 6.3.0 to 6.4.0 in /website

Bumps [concurrently](https://github.com/open-cli-tools/concurrently) from 6.3.0 to 6.4.0.
- [Release notes](https://github.com/open-cli-tools/concurrently/releases)
- [Commits](https://github.com/open-cli-tools/concurrently/compare/v6.3.0...v6.4.0)

---
updated-dependencies:
- dependency-name: concurrently
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

website/package.json

@@ -48,7 +48,7 @@
     ]
   },
   "devDependencies": {
-    "concurrently": "^6.3.0",
+    "concurrently": "^6.4.0",
     "cypress": "^8.7.0",
     "cypress-localstorage-commands": "^1.6.1",
     "start-server-and-test": "^1.13.1"

website/yarn.lock

@@ -3068,10 +3068,10 @@ concat-map@0.0.1:
   resolved "https://registry.yarnpkg.com/concat-map/-/concat-map-0.0.1.tgz#d8a96bd77fd68df7793a73036a3ba0d5405d477b"
   integrity sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=
 
-concurrently@^6.3.0:
-  version "6.3.0"
-  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-6.3.0.tgz#63128cb4a6ed54d3c0ed8528728590a5fe54582a"
-  integrity sha512-k4k1jQGHHKsfbqzkUszVf29qECBrkvBKkcPJEUDTyVR7tZd1G/JOfnst4g1sYbFvJ4UjHZisj1aWQR8yLKpGPw==
+concurrently@^6.4.0:
+  version "6.4.0"
+  resolved "https://registry.yarnpkg.com/concurrently/-/concurrently-6.4.0.tgz#5387ee86be435a0eb51c292ade8a00acf479f170"
+  integrity sha512-HZ3D0RTQMH3oS4gvtYj1P+NBc6PzE2McEra6yEFcQKrUQ9HvtTGU4Dbne083F034p+LRb7kWU0tPRNvSGs1UCQ==
   dependencies:
     chalk "^4.1.0"
     date-fns "^2.16.1"