Bump axe-core from 4.8.3 to 4.8.4

Bumps [axe-core](https://github.com/dequelabs/axe-core) from 4.8.3 to 4.8.4.
- [Release notes](https://github.com/dequelabs/axe-core/releases)
- [Changelog](https://github.com/dequelabs/axe-core/blob/v4.8.4/CHANGELOG.md)
- [Commits](dequelabs/axe-core@v4.8.3...v4.8.4)

---
updated-dependencies:
- dependency-name: axe-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

package.json

@@ -32,7 +32,7 @@
     }
   },
   "dependencies": {
-    "axe-core": "^4.8.3",
+    "axe-core": "^4.8.4",
     "govuk-frontend": "4.7.0",
     "sortablejs": "^1.15.2"
   },

yarn.lock

@@ -423,10 +423,10 @@ async@^3.2.3:
   resolved "https://registry.yarnpkg.com/async/-/async-3.2.3.tgz#ac53dafd3f4720ee9e8a160628f18ea91df196c9"
   integrity sha512-spZRyzKL5l5BZQrr/6m/SqFdBN0q3OCI0f9rjfBzCMBIP4p75P620rR3gTmaksNOhmzgdxcaxdNfMy6anrbM0g==
 
-axe-core@^4.8.3:
-  version "4.8.3"
-  resolved "https://registry.yarnpkg.com/axe-core/-/axe-core-4.8.3.tgz#205df863dd9917d5979e9435dab4d47692759051"
-  integrity sha512-d5ZQHPSPkF9Tw+yfyDcRoUOc4g/8UloJJe5J8m4L5+c7AtDdjDLRxew/knnI4CxvtdxEUVgWz4x3OIQUIFiMfw==
+axe-core@^4.8.4:
+  version "4.8.4"
+  resolved "https://registry.yarnpkg.com/axe-core/-/axe-core-4.8.4.tgz#90db39a2b316f963f00196434d964e6e23648643"
+  integrity sha512-CZLSKisu/bhJ2awW4kJndluz2HLZYIHh5Uy1+ZwDRkJi69811xgIXXfdU9HSLX0Th+ILrHj8qfL/5wzamsFtQg==
 
 balanced-match@^1.0.0:
   version "1.0.2"