Remove Ubuntu Mantic as EoL

Author: Lord-Grey

.github/workflows/package.yml

@@ -33,7 +33,6 @@ jobs:
         os: [
           { distribution: ubuntu, codename: focal,    description: Ubuntu 20.04 (Focal Fossa)     },
           { distribution: ubuntu, codename: jammy,    description: Ubuntu 22.04 (Jammy Jellyfish) },
-          { distribution: ubuntu, codename: mantic,   description: Ubuntu 23.10 (Mantic Minotaur) },
           { distribution: ubuntu, codename: noble,    description: Ubuntu 24.04 (Noble Numbat)    },
           { distribution: ubuntu, codename: oracular, description: Ubuntu 24.10 (Oracular Oriole) },
           { distribution: debian, codename: buster,   description: Debian 10.x  (Buster)          },