Update windows-specific-properties.md (#464)

fix txtShortcutName not found exception

Author: workcheng

docs/windows-specific-properties.md

@@ -21,7 +21,7 @@
     <copyright>${organizationName}</copyright>
     <productName>${name}</productName>
     <internalName>${name}</internalName>
-    <txtShortcutName>${name}</txtShortcutName>
+    <shortcutName>${name}</shortcutName>
     <originalFilename>${name}.exe</originalFilename>
 
     <!-- choose EXE creation tool -->