fixed labels for decryption action

Author: Nathan McMinn

pdf-toolkit-share/src/main/amp/config/alfresco/messages/pdftoolkit.properties

@@ -18,7 +18,7 @@ pdftoolkit.watermark.image=Watermark Image
 #Doclib action labels 
 actions.pdftoolkit.mergePDF=Merge PDF Document
 actions.pdftoolkit.encryptPDF=Encrypt PDF Document
-actions.pdftoolkit.encryptPDF=Decrypt PDF Document
+actions.pdftoolkit.decryptPDF=Decrypt PDF Document
 actions.pdftoolkit.insertPDF=Insert Pages into PDF
 actions.pdftoolkit.splitPDF=Split PDF Document
 actions.pdftoolkit.splitPDFatpage=Split PDF Document at Page