micronaut: 1.2.3 -> 1.2.5 (#71697)

* micronaut: 1.2.3 -> 1.2.5

Semi-automatic update generated by
https://github.com/ryantm/nixpkgs-update tools. This update was made
based on information from
https://repology.org/metapackage/micronaut/versions

* micronaut: keep description short

and run pre+post hooks when overriding install phase