Fix nuspec name and update script version for VCarve Pro 12.0

vcarve-pro-makerspace-12.0/update.sh

@@ -8,7 +8,7 @@ major_version=$(awk -F. -v RS='\r\n' '{print $1"."$2}' <<< $version)
 minor_version=$(awk -F. -v RS='\r\n' '{print $3"."$4}' <<< $version)
 checksum=$(sha256sum $file  | awk '{print $1}')
 
-if [ "$major_version" != "11.0" ]
+if [ "$major_version" != "12.0" ]
 then
     echo "Major version update! This probably won't really work well."
     exit 1