fix(pdf): add missing .save() call to trigger file download

html2pdf().from().set() only configures, .save() actually triggers
the browser download dialog.

src/pages/resume-5.html

@@ -922,7 +922,7 @@
             image: { type: 'jpeg', quality: 0.95 },
             html2canvas: { scale: 2, useCORS: true, backgroundColor: '#fff' },
             jsPDF: { unit: 'mm', format: 'a4', orientation: 'portrait' }
-          });
+          }).save();
         })
         .then(function (result) {
           console.log('[PDF] step 5: generation COMPLETE, result:', result);