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

Bumps [@salesforce/cli-plugins-testkit](https://github.com/salesforcecli/cli-plugins-testkit) from 4.2.7 to 4.2.8.
- [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@4.2.7...4.2.8)

---
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

@@ -16,7 +16,7 @@
   },
   "devDependencies": {
     "@oclif/plugin-command-snapshot": "^4.0.7",
-    "@salesforce/cli-plugins-testkit": "^4.2.7",
+    "@salesforce/cli-plugins-testkit": "^4.2.8",
     "@salesforce/dev-config": "^4.0.1",
     "@salesforce/dev-scripts": "^5.4.3",
     "@salesforce/plugin-command-reference": "^3.0.20",

yarn.lock

@@ -896,12 +896,12 @@
     mv "~2"
     safe-json-stringify "~1"
 
-"@salesforce/cli-plugins-testkit@^4.2.7":
-  version "4.2.7"
-  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-4.2.7.tgz#ef70578e4a5fad7f21b72767b376b97060739b7a"
-  integrity sha512-PezUYl8972E3Ozh4y3wghSkQ0aFdpgjQ00F60NsIpQsk/FRvBYGECImJEL2sAZtwWeuiSCCAjkGGGpEEG2VSEA==
+"@salesforce/cli-plugins-testkit@^4.2.8":
+  version "4.2.8"
+  resolved "https://registry.yarnpkg.com/@salesforce/cli-plugins-testkit/-/cli-plugins-testkit-4.2.8.tgz#92cfd53e2e8c1c01fd189e24a49ba3b6610b7def"
+  integrity sha512-321rtZIArosBMl7XgyfYoQL8HTF0NjMt4bXWINqnseB+sIg3BdAExHJkGQvaLj0zMpecwSXtZYRSmU6ziuuNtg==
   dependencies:
-    "@salesforce/core" "^4.3.7"
+    "@salesforce/core" "^4.3.11"
     "@salesforce/kit" "^3.0.6"
     "@salesforce/ts-types" "^2.0.2"
     "@types/shelljs" "^0.8.12"