fabric-*: require Fabric Loader 0.12.12

This is the release that includes all current log4j mitigation.
Changes in fabric.mod.json ensure the mod will completely refuse to load
unless it's on a fully patched Fabric server.

fabric-1.18/gradle.properties

@@ -8,7 +8,7 @@ archives_base_name=Dynmap
 # check these on https://fabricmc.net/versions.html
 minecraft_version=1.18
 yarn_mappings=1.18+build.1
-loader_version=0.12.6
+loader_version=0.12.12
 
 #Fabric api
 fabric_version=0.43.1+1.18

fabric-1.18/src/main/resources/fabric.mod.json

@@ -26,7 +26,7 @@
   ],
 
   "depends": {
-    "fabricloader": ">=0.12.6",
+    "fabricloader": ">=0.12.12",
     "fabric": ">=0.43.1",
     "minecraft": "1.18.x"
   }