feat(mkdocs): bump poetry version used for building docs

The poetry export plugin now requires a later release of poetry. Bump
the default version.

CHANGELOG.md

@@ -5,6 +5,13 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [6.5.0] - 2025-01-13
+
+### Changed
+
+- bumped default version of `poetry` used by mkdocs jobs to work around the
+  export plugin requiring a later version.
+
 ## [6.4.3] - 2024-12-13
 
 ### Fixed

python-common.yml

@@ -6,7 +6,7 @@ variables:
   PYTHON_IMAGE: registry.gitlab.developers.cam.ac.uk/uis/devops/infra/dockerimages/python:$PYTHON_VERSION-alpine
 
   # Default poetry version to use
-  PYTHON_POETRY_VERSION: "1.8.3"
+  PYTHON_POETRY_VERSION: "2.0.1"
 
 # A default set of python versions to test. This is usually the most recent three released versions. Note that adding a
 # new version here also requires that we add a new version to the common docker image repository project.