Update CreateDeb to replace dev channel reference with beta

Author: Glavo

buildSrc/src/main/java/org/jackhuang/hmcl/gradle/pack/CreateDeb.java

@@ -55,7 +55,7 @@
 /// ## Channel commands and aliases
 ///
 /// Every package installs a channel-specific executable such as `hmcl-stable`
-/// or `hmcl-dev`. The generic `hmcl` command is intentionally not shipped as a
+/// or `hmcl-beta`. The generic `hmcl` command is intentionally not shipped as a
 /// plain file. Instead, maintainer scripts register the channel command into
 /// the shared `hmcl` alternatives group so multiple channel packages can
 /// coexist without file conflicts.