chore(dev-deps): bump @salesforce/cli-plugins-testkit

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 5.3.26 to 5.3.28.
- [Release notes](https://github.com/salesforcecli/cli-plugins-testkit/releases)
- [Changelog](https://github.com/salesforcecli/cli-plugins-testkit/blob/main/CHANGELOG.md)
- [Commits](salesforcecli/cli-plugins-testkit@5.3.26...5.3.28)

---
updated-dependencies:
- dependency-name: "@salesforce/cli-plugins-testkit"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -57,7 +57,7 @@
     "object-treeify": "^2"
   },
   "devDependencies": {
-    "@salesforce/cli-plugins-testkit": "^5.3.26",
+    "@salesforce/cli-plugins-testkit": "^5.3.28",
     "@salesforce/dev-scripts": "^10.2.9",
     "@types/globby": "^9.1.0",
     "@types/jszip": "^3.4.1",

yarn.lock

@@ -507,12 +507,12 @@
   resolved "https://registry.yarnpkg.com/@pkgjs/parseargs/-/parseargs-0.11.0.tgz#a77ea742fab25775145434eb1d2328cf5013ac33"
   integrity sha512-+1VkjdD0QBLPodGrJUeqarH8VAIvQODIbwh9XpP5Syisf7YoQgsJKPNFoqqLQlu+VQ/tVSshMR6loPMn8U+dPg==
 
-"@salesforce/cli-plugins-testkit@^5.3.26":
-  version "5.3.26"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.26.tgz#11f4946b24749a7f32125688ed43ae9dbc248e60"
-  integrity sha512-5+Cx0Gbx5v+uvB6TQr+gHIRULOCUhzLtlBRh2UZQoWlUihlOvTYIOXqWQP50qm92KlV0iv3LJ25zJQDFnvAIzQ==
+"@salesforce/cli-plugins-testkit@^5.3.28":
+  version "5.3.28"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-5.3.28.tgz#5f102c23446009be88c386507722d7ac1d0ab64f"
+  integrity sha512-kO/TgIOGin+grB+T93dILA1VbrQbtuoLyD2N/LAAhBeqBG8XtrZdll/9GJ6FdSfpZO5p4KNvffBjtrO34pUJVw==
   dependencies:
-    "@salesforce/core" "^8.4.0"
+    "@salesforce/core" "^8.5.1"
     "@salesforce/kit" "^3.2.1"
     "@salesforce/ts-types" "^2.0.11"
     "@types/shelljs" "^0.8.15"