Fix misspelled command

app.py

@@ -3,7 +3,7 @@
 import subprocess
 import os
 
-dotnet_check_command = "dotnet -list-sdk"
+dotnet_check_command = "dotnet --list-sdks"
 dotnet_install_commands = [
     "wget https://dot.net/v1/dotnet-install.sh -O dotnet-install.sh",
     "chmod +x ./dotnet-install.sh",
@@ -11,7 +11,7 @@ dotnet_install_commands = [
 ]
 
 try:
-    print(subprocess.check_output("dotnet -list-sdk"))
+    print(subprocess.check_output(dotnet_check_command, shell=True))
 except:
     print(os.environ["PATH"])
 
@@ -24,7 +24,7 @@ except:
     
     print(os.environ["PATH"])
 
-    os.system("dotnet -list-sdk")
+    os.system(dotnet_check_command)
     # print(subprocess.check_output("dotnet -list-sdk"))
 
 import gradio as gr