Merge pull request #556 from Aryangh1379/Hiddify-develop

AppRun file error fixed. AppImage now is usable

linux/packaging/appimage/AppRun

@@ -1,9 +1,9 @@
 #!/bin/bash
 
-cd "\$(dirname "\$0")"
+cd "$(dirname "$0")"
 export LD_LIBRARY_PATH=usr/lib
 if [ "$1" == "HiddifyService" ];then
     exec ./$@
 else
-    exec ./$appName $@
+    exec ./hiddify $@
 fi