fix(installer): avoid duplicate pause prompts

scripts/Install_Prem.bat

@@ -1,7 +1,7 @@
 @echo off
 
 :: Line for changing spotx parameters, each parameter should be separated by a space
-set param=-premium -new_theme
+set param=-premium -new_theme -no_pause
 
 set url='https://raw.githubusercontent.com/SpotX-Official/SpotX/refs/heads/main/run.ps1'
 set url2='https://spotx-official.github.io/SpotX/run.ps1'
@@ -11,4 +11,4 @@ set tls=[Net.ServicePointManager]::SecurityProtocol = [Net.ServicePointManager]:
 -Command %tls% $p='%param%'; """ & { $(try { iwr -useb %url% } catch { $p+= ' -m'; iwr -useb %url2% })} $p """" | iex
 
 pause
-exit /b
+exit /b