chore: update license header

Author: paodb

vcf-pdf-viewer/src/main/java/com/vaadin/componentfactory/pdfviewer/PdfViewer.java

@@ -2,7 +2,7 @@
  * #%L
  * Pdf Viewer
  * %%
- * Copyright (C) 2021 Vaadin Ltd
+ * Copyright (C) 2021 - 2025 Vaadin Ltd
  * %%
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.