chore(deps): bump cdk-nag in /examples/servers/book-search

Bumps [cdk-nag](https://github.com/cdklabs/cdk-nag) from 2.36.50 to 2.37.8.
- [Release notes](https://github.com/cdklabs/cdk-nag/releases)
- [Commits](cdklabs/cdk-nag@v2.36.50...v2.37.8)

---
updated-dependencies:
- dependency-name: cdk-nag
  dependency-version: 2.37.8
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

examples/servers/book-search/requirements.txt

@@ -1,4 +1,4 @@
 aws-cdk-lib==2.208.0
 aws-cdk.aws-lambda-python-alpha==2.212.0a0
 constructs>=10.0.0,<11.0.0
-cdk-nag==2.36.50
+cdk-nag==2.37.8