chore(deps): bump the aws-sdk group with 1 update (#2313)

Bumps the aws-sdk group with 1 update: [@aws-sdk/client-lambda](https://github.com/aws/aws-sdk-js-v3/tree/HEAD/clients/client-lambda).


Updates `@aws-sdk/client-lambda` from 3.540.0 to 3.548.0
- [Release notes](https://github.com/aws/aws-sdk-js-v3/releases)
- [Changelog](https://github.com/aws/aws-sdk-js-v3/blob/main/clients/client-lambda/CHANGELOG.md)
- [Commits](https://github.com/aws/aws-sdk-js-v3/commits/v3.548.0/clients/client-lambda)

---
updated-dependencies:
- dependency-name: "@aws-sdk/client-lambda"
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: aws-sdk
...

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packages/testing/package.json

@@ -95,7 +95,7 @@
   "homepage": "https://github.com/aws-powertools/powertools-lambda-typescript/tree/main/packages/testing#readme",
   "dependencies": {
     "@aws-cdk/cli-lib-alpha": "^2.121.1-alpha.0",
-    "@aws-sdk/client-lambda": "^3.540.0",
+    "@aws-sdk/client-lambda": "^3.548.0",
     "@smithy/util-utf8": "^2.3.0",
     "aws-cdk-lib": "^2.135.0",
     "esbuild": "^0.20.2"