chore: update to 5.12.0 release.

Updated to the newest Luanti release.

Author: ronoaldo

.github/workflows/multiarch.yaml

@@ -27,17 +27,17 @@ jobs:
               MINETEST_GAME_VERSION=master
               LUAJIT_VERSION=v2.1
             tags: |-
-              5.11.0-dev
+              5.13.0-dev
               unstable
               dev
             platforms: |-
               linux/amd64
               linux/arm64
           - dockerfile: Dockerfile
             args: |-
-              LUANTI_VERSION=5.10.0
-              MINETEST_GAME_VERSION=f4f365970ac10f2a510a03df392772683177980c
-              LUAJIT_VERSION=f73e649a954b599fc184726c376476e7a5c439ca
+              LUANTI_VERSION=5.12.0
+              MINETEST_GAME_VERSION=844216cbb8a8647999ed3cb858e1f0fddafea01f
+              LUAJIT_VERSION=f9140a622a0c44a99efb391cc1c2358bc8098ab7
             tags: |-
               stable
               stable-5