Update python Docker tag to v3.14

Author: renovate[bot]

Dockerfile

@@ -4,7 +4,7 @@
 # bzt run: docker run --shm-size=4g -v "$PWD:/dc-app-performance-toolkit" atlassian/dcapt jira.yml
 # interactive run: docker run -it --entrypoint="/bin/bash" -v "$PWD:/dc-app-performance-toolkit" atlassian/dcapt
 
-FROM python:3.13-slim-bookworm
+FROM python:3.14-slim-bookworm
 
 ENV APT_INSTALL="apt-get -y install --no-install-recommends"