Bump the docker-tests group in /tests with 1 update (#6642)

* Bump the docker-tests group in /tests with 2 updates

Bumps the docker-tests group in /tests with 2 updates: kindest/node and python.


Updates `kindest/node` from v1.31.0 to v1.31.1

Updates `python` from 3.12 to 3.13

---
updated-dependencies:
- dependency-name: kindest/node
  dependency-type: direct:production
  dependency-group: docker-tests
- dependency-name: python
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: docker-tests
...

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

* revert python 3.13 -> 3.12 due to breaking change

---------

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

tests/Dockerfile

@@ -1,6 +1,6 @@
 # syntax=docker/dockerfile:1.5
 # this is here so we can grab the latest version of kind and have dependabot keep it up to date
-FROM kindest/node:v1.31.0@sha256:53df588e04085fd41ae12de0c3fe4c72f7013bba32a20e7325357a1ac94ba865
+FROM kindest/node:v1.31.1@sha256:cd224d8da58d50907d1dd41d476587643dad2ffd9f6a4d96caf530fb3b9a5956
 
 # this is here so we can grab the latest version of skopeo and have dependabot keep it up to date
 FROM quay.io/skopeo/stable:v1.16.1