chore(deps): bump @smithy/signature-v4 in /examples/chatbots/typescript

Bumps [@smithy/signature-v4](https://github.com/smithy-lang/smithy-typescript/tree/HEAD/packages/signature-v4) from 5.1.3 to 5.2.0.
- [Release notes](https://github.com/smithy-lang/smithy-typescript/releases)
- [Changelog](https://github.com/smithy-lang/smithy-typescript/blob/main/packages/signature-v4/CHANGELOG.md)
- [Commits](https://github.com/smithy-lang/smithy-typescript/commits/@smithy/signature-v4@5.2.0/packages/signature-v4)

---
updated-dependencies:
- dependency-name: "@smithy/signature-v4"
  dependency-version: 5.2.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

examples/chatbots/typescript/package-lock.json

@@ -18,7 +18,7 @@
     "winston": "^3.17.0",
     "@aws-sdk/protocol-http": "^3.374.0",
     "@aws-sdk/types": "^3.862.0",
-    "@smithy/signature-v4": "^5.0.2",
+    "@smithy/signature-v4": "^5.2.0",
     "@aws-crypto/sha256-js": "^5.2.0"
   },
   "devDependencies": {