Fix menu.sh and update.sh bugs

core/scripts/hysteria2/update.sh

@@ -8,7 +8,7 @@ echo "Backing up the current configuration..."
 cp "$CONFIG_FILE" /etc/hysteria/config_backup.json
 if [ $? -ne 0 ]; then
     echo "Error: Failed to back up configuration. Aborting update."
-    return 1
+    exit 1
 fi
 
 echo "Downloading and installing the latest version of Hysteria2..."
@@ -17,21 +17,21 @@ if [ $? -ne 0 ]; then
     echo "Error: Failed to download or install the latest version. Restoring backup configuration."
     mv /etc/hysteria/config_backup.json "$CONFIG_FILE"
     python3 "$CLI_PATH" restart-hysteria2 > /dev/null 2>&1
-    return 1
+    exit 1
 fi
 
 echo "Restoring configuration from backup..."
 mv /etc/hysteria/config_backup.json "$CONFIG_FILE"
 if [ $? -ne 0 ]; then
     echo "Error: Failed to restore configuration from backup."
-    return 1
+    exit 1
 fi
 
 echo "Modifying systemd service to use config.json..."
 sed -i "s|/etc/hysteria/config.yaml|$CONFIG_FILE|" /etc/systemd/system/hysteria-server.service
 if [ $? -ne 0 ]; then
     echo "Error: Failed to modify systemd service."
-    return 1
+    exit 1
 fi
 
 rm /etc/hysteria/config.yaml
@@ -39,9 +39,9 @@ systemctl daemon-reload >/dev/null 2>&1
 python3 "$CLI_PATH" restart-hysteria2 > /dev/null 2>&1
 if [ $? -ne 0 ]; then
     echo "Error: Failed to restart Hysteria2 service."
-    return 1
+    exit 1
 fi
 
 echo "Hysteria2 has been successfully updated."
 echo ""
-return 0
+exit 0