Bump python from 0ce7774 to 838ff46 in /docker (#155)

Bumps python from `0ce7774` to `838ff46`.

---
updated-dependencies:
- dependency-name: python
  dependency-version: 3.11.13-slim-bookworm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

docker/Dockerfile

@@ -1,6 +1,6 @@
 # This should be kept in sync with the python version used in .devcontainer/Dockerfile and
 # docker/images/fakesentry/Dockerfile
-FROM --platform=linux/amd64 python:3.11.13-slim-bookworm@sha256:0ce77749ac83174a31d5e107ce0cfa6b28a2fd6b0615e029d9d84b39c48976ee
+FROM --platform=linux/amd64 python:3.11.13-slim-bookworm@sha256:838ff46ae6c481e85e369706fa3dea5166953824124735639f3c9f52af85f319
 
 # Set up user and group
 ARG groupid=10001