Promote build channel to BETA

Author: kennytv

gradle.properties

@@ -3,7 +3,7 @@ mcVersion=26.1.2
 # This is the current API version for use in (paper-)plugin.yml files
 # During snapshot cycles this should be the anticipated version of the release target
 apiVersion=26.1.2
-channel=ALPHA
+channel=BETA
 
 # Set to true while updating Minecraft version
 updatingMinecraft=false