build(deps): bump google-cloud-ndb from 2.3.0 to 2.3.1

Bumps [google-cloud-ndb](https://github.com/googleapis/python-ndb) from 2.3.0 to 2.3.1.
- [Release notes](https://github.com/googleapis/python-ndb/releases)
- [Changelog](https://github.com/googleapis/python-ndb/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/python-ndb/compare/v2.3.0...v2.3.1)

---
updated-dependencies:
- dependency-name: google-cloud-ndb
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements.txt

@@ -44,7 +44,7 @@ google-cloud-datastore==2.16.1
 google-cloud-dns==0.35.0
 google-cloud-error-reporting==1.10.0
 google-cloud-logging==3.10.0
-google-cloud-ndb==2.3.0
+google-cloud-ndb==2.3.1
 google-cloud-tasks==2.16.3
 googleapis-common-protos==1.63.0
 grpc-google-iam-v1==0.13.0