chore(deps-dev): update serverless requirement from ^4.27.0 to ^4.28.0 in /examples/deploy-aws-lambda (#2741)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

examples/deploy-aws-lambda/package.json

@@ -12,7 +12,7 @@
     "@slack/bolt": "^4.6.0"
   },
   "devDependencies": {
-    "serverless": "^4.27.0",
+    "serverless": "^4.28.0",
     "serverless-offline": "^14.4.0"
   }
 }