fix(deps): update copier template to v4.2.3

This MR contains the following updates:

Package	Type	Update	Change
https://gitlab.developers.cam.ac.uk/uis/devops/webapp-boilerplate.git	template	patch	4.2.2 -> 4.2.3

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Release Notes

uis/devops/webapp-boilerplate (https://gitlab.developers.cam.ac.uk/uis/devops/webapp-boilerplate.git)

v4.2.3

Compare Source

Bug Fixes

• release-it bumper path matching new pyproject.toml structure (34cc5f6)

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