Fix API.internal.pages not being updated when restoring a RenderTarget ( #3898 ) (#3899)

Co-authored-by: quentin.legrand <quentin.legrand@peoplbrain.com>
Co-authored-by: Lukas Holländer <lukas.hollaender@yworks.com>

Author: 3 people

src/jspdf.js

@@ -6043,7 +6043,9 @@ function jsPDF(options) {
     getEncryptor: getEncryptor,
     output: output,
     getNumberOfPages: getNumberOfPages,
-    pages: pages,
+    get pages() {
+      return pages;
+    },
     out: out,
     f2: f2,
     f3: f3,