Bump python from 3.11.2-alpine3.17 to 3.11.5-alpine3.17

Bumps python from 3.11.2-alpine3.17 to 3.11.5-alpine3.17.

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

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

Dockerfile

@@ -1,5 +1,5 @@
 # syntax = docker/dockerfile:latest
-FROM python:3.11.2-alpine3.17
+FROM python:3.11.5-alpine3.17
 LABEL maintainer='github.com/borgmatic-collective'
 VOLUME /mnt/source
 VOLUME /mnt/borg-repository