Bump mypy-boto3-dynamodb from 1.37.12 to 1.38.4 in /mesh_processor

Bumps [mypy-boto3-dynamodb](https://github.com/youtype/mypy_boto3_builder) from 1.37.12 to 1.38.4.
- [Release notes](https://github.com/youtype/mypy_boto3_builder/releases)
- [Commits](https://github.com/youtype/mypy_boto3_builder/commits)

---
updated-dependencies:
- dependency-name: mypy-boto3-dynamodb
  dependency-version: 1.38.4
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

mesh_processor/poetry.lock

@@ -9,7 +9,7 @@ packages    = [{include = "src"}]
 [tool.poetry.dependencies]
 python = "~3.10"
 boto3 = "~1.26.90"
-mypy-boto3-dynamodb = "^1.26.164"
+mypy-boto3-dynamodb = "^1.38.4"
 moto = "~4.2.11"
 
 [build-system]