fix(deps): bump @salesforce/core from 8.2.8 to 8.4.0

Bumps [@salesforce/core](https://github.com/forcedotcom/sfdx-core) from 8.2.8 to 8.4.0.
- [Release notes](https://github.com/forcedotcom/sfdx-core/releases)
- [Changelog](https://github.com/forcedotcom/sfdx-core/blob/main/CHANGELOG.md)
- [Commits](forcedotcom/sfdx-core@8.2.8...8.4.0)

---
updated-dependencies:
- dependency-name: "@salesforce/core"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

package.json

@@ -14,7 +14,7 @@
     "@octokit/plugin-paginate-rest": "^6.1.2",
     "@octokit/plugin-throttling": "^5.2.3",
     "@salesforce/cli-plugins-testkit": "^5.3.20",
-    "@salesforce/core": "^8.1.0",
+    "@salesforce/core": "^8.4.0",
     "@salesforce/kit": "^3.2.0",
     "@salesforce/plugin-command-reference": "^3.1.11",
     "@salesforce/plugin-trust": "^3.7.17",

yarn.lock

@@ -1912,10 +1912,10 @@
     strip-ansi "6.0.1"
     ts-retry-promise "^0.8.1"
 
-"@salesforce/core@^8.1.0", "@salesforce/core@^8.1.1", "@salesforce/core@^8.2.1", "@salesforce/core@^8.2.3", "@salesforce/core@^8.2.7":
-  version "8.2.8"
-  resolved "https://registry.yarnpkg.com/@salesforce/core/-/core-8.2.8.tgz#1e93ddd8b9f348f1e20547de4cdff30062520fd9"
-  integrity sha512-Fyy1TG9cUtQV+YAjyYCHerZ0K/t9fuB6dU9HrXFvcjMKorMS5JaI1wkZh8w1+zfvu6GY/MOzeqVZCq2W+9ShLA==
+"@salesforce/core@^8.1.0", "@salesforce/core@^8.1.1", "@salesforce/core@^8.2.1", "@salesforce/core@^8.2.3", "@salesforce/core@^8.2.7", "@salesforce/core@^8.4.0":
+  version "8.4.0"
+  resolved "https://registry.yarnpkg.com/@salesforce/core/-/core-8.4.0.tgz#d2ddfe07994c42b1e917e581e9cf47ad27b97a93"
+  integrity sha512-P+n0+Sp+v6voLTShW2E5sdF7gCUxEXJjNcc9Jtto0ZMyQesmQJ6WGpWmAuRoi+BVYc8OPSlEffndaYDAo/u73g==
   dependencies:
     "@jsforce/jsforce-node" "^3.4.0"
     "@salesforce/kit" "^3.1.6"