911054: Update sample for how to change the thumbnail pane zoom percentage programmatically in WPF PdfViewer#88

Vikassekar merged 1 commit intomasterSyncfusionExamples/WPF-PDFViewer-Examples:masterfrom

911054_thumbnailSyncfusionExamples/WPF-PDFViewer-Examples:911054_thumbnailCopy head branch name to clipboard