fix(deps): bump @salesforce/core from 8.6.3 to 8.6.4

Bumps [@salesforce/core](https://github.com/forcedotcom/sfdx-core) from 8.6.3 to 8.6.4.
- [Release notes](https://github.com/forcedotcom/sfdx-core/releases)
- [Changelog](https://github.com/forcedotcom/sfdx-core/blob/main/CHANGELOG.md)
- [Commits](forcedotcom/sfdx-core@8.6.3...8.6.4)

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

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

package.json

@@ -8,7 +8,7 @@
   "types": "lib/exported.d.ts",
   "repository": "forcedotcom/agents",
   "dependencies": {
-    "@salesforce/core": "^8.5.2"
+    "@salesforce/core": "^8.6.4"
   },
   "devDependencies": {
     "@salesforce/cli-plugins-testkit": "^5.3.8",