Update Release Date

CITATION.cff

@@ -35,7 +35,7 @@ title: "Mantid Imaging"
 abstract: "Mantid Imaging is a graphical toolkit for performing 3D reconstruction of neutron tomography data.  It provides an easy-to-use graphical interface to a wide range of pre/post-processing operations, tilt correction and reconstruction algorithms, accommodating for tomography users with varying data complexity and image analysis background knowledge. It utilises a flexible plugin system that allows easy integration of external software, and has allowed us to re-use software widely known in the neutron tomography community."
 version: "2.7.0"
 doi: 10.5281/zenodo.4728059
-date-released: 2023-05-04
+date-released: 2024-02-21
 license: "GPL-3.0-or-later"
 repository-code: https://github.com/mantidproject/mantidimaging
 url: https://mantidproject.github.io/mantidimaging