Bump ajv from 8.3.0 to 8.4.0 in /dashboard (#2813)

Bumps [ajv](https://github.com/ajv-validator/ajv) from 8.3.0 to 8.4.0.
- [Release notes](https://github.com/ajv-validator/ajv/releases)
- [Commits](ajv-validator/ajv@v8.3.0...v8.4.0)

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

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

dashboard/package.json

@@ -26,7 +26,7 @@
     "@types/react-transition-group": "^4.4.1",
     "@types/semver": "^7.3.6",
     "@types/ws": "^7.4.2",
-    "ajv": "^8.3.0",
+    "ajv": "^8.4.0",
     "axios": "^0.21.1",
     "connected-react-router": "^6.9.1",
     "enzyme-adapter-react-16": "^1.1.1",

dashboard/yarn.lock

@@ -2885,10 +2885,10 @@ ajv@^6.1.0, ajv@^6.10.0, ajv@^6.10.2, ajv@^6.12.3, ajv@^6.12.4, ajv@^6.12.5, ajv
     json-schema-traverse "^0.4.1"
     uri-js "^4.2.2"
 
-ajv@^8.0.1, ajv@^8.3.0:
-  version "8.3.0"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-8.3.0.tgz#25ee7348e32cdc4a1dbb38256bf6bdc451dd577c"
-  integrity sha512-RYE7B5An83d7eWnDR8kbdaIFqmKCNsP16ay1hDbJEU+sa0e3H9SebskCt0Uufem6cfAVu7Col6ubcn/W+Sm8/Q==
+ajv@^8.0.1, ajv@^8.4.0:
+  version "8.4.0"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-8.4.0.tgz#48984fdb2ce225cab15795f0772a8d85669075e4"
+  integrity sha512-7QD2l6+KBSLwf+7MuYocbWvRPdOu63/trReTLu2KFwkgctnub1auoF+Y1WYcm09CTM7quuscrzqmASaLHC/K4Q==
   dependencies:
     fast-deep-equal "^3.1.1"
     json-schema-traverse "^1.0.0"