Bump @azure-tools/typespec-providerhub in /typespec

Bumps [@azure-tools/typespec-providerhub](https://github.com/Azure/typespec-azure-pr) from 0.46.0 to 0.49.0.
- [Commits](https://github.com/Azure/typespec-azure-pr/commits)

---
updated-dependencies:
- dependency-name: "@azure-tools/typespec-providerhub"
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

typespec/package.json

@@ -7,7 +7,7 @@
     "@azure-tools/typespec-autorest": "~0.46.0",
     "@azure-tools/typespec-azure-core": "~0.46.0",
     "@azure-tools/typespec-azure-resource-manager": "~0.46.0",
-    "@azure-tools/typespec-providerhub": "~0.46.0",
+    "@azure-tools/typespec-providerhub": "~0.49.0",
     "@typespec/http": "~0.60.0",
     "@typespec/openapi": "~0.60.0",
     "@typespec/rest": "~0.60.0",