testing: update docker-py 6.1.3

full diff: https://github.com/docker/docker-py/compare/6.0.1...6.1.3

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit a9a0ffaf518bc9c1bd3b03d0dd81f126d52a0838)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

hack/make/test-docker-py

@@ -4,7 +4,7 @@ set -e
 source hack/make/.integration-test-helpers
 
 # The commit or tag to use for testing
-: "${DOCKER_PY_COMMIT:=6.0.1}"
+: "${DOCKER_PY_COMMIT:=6.1.3}"
 
 # The version (and variant) of the python image to use for the tests;
 # see https://github.com/docker/docker-py/blob/5.0.3/tests/Dockerfile#L1C5-L3