build(deps-dev): bump @azure-tools/typespec-client-generator-core

Bumps the typespec group with 1 update in the / directory: [@azure-tools/typespec-client-generator-core](https://github.com/Azure/typespec-azure).


Updates `@azure-tools/typespec-client-generator-core` from 0.64.5 to 0.64.6
- [Release notes](https://github.com/Azure/typespec-azure/releases)
- [Commits](https://github.com/Azure/typespec-azure/commits)

---
updated-dependencies:
- dependency-name: "@azure-tools/typespec-client-generator-core"
  dependency-version: 0.64.6
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: typespec
...

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

Author: dependabot[bot]

package-lock.json

@@ -11,7 +11,7 @@
     "@azure-tools/typespec-azure-resource-manager": "0.64.1",
     "@azure-tools/typespec-azure-rulesets": "0.64.0",
     "@azure-tools/typespec-client-generator-cli": "0.31.0",
-    "@azure-tools/typespec-client-generator-core": "0.64.5",
+    "@azure-tools/typespec-client-generator-core": "0.64.6",
     "@azure-tools/typespec-liftr-base": "0.10.0",
     "@autorest/openapi-to-typespec": "0.11.12",
     "@azure/avocado": "0.10.5",