Update PDF generation height calculation and corresponding test value

This commit modifies the height calculation in the PDF generation function to increase the height by 2 pixels when the height option is set to 'auto'. Additionally, the related test has been updated to reflect this change, ensuring that the expected height value is now 122px instead of 121px. These adjustments improve the accuracy of the PDF rendering process.

src/templates/__tests__/pdffactory.test.js

@@ -94,7 +94,7 @@ describe('PDF Factory', () => {
     expect(page.pdf).toHaveBeenCalledWith(
       expect.objectContaining({
         width: '80mm',
-        height: '121px',
+        height: '122px',
       })
     );
   });

src/templates/pdffactory.js

@@ -129,7 +129,7 @@ export async function generatePDF(html, options = {}) {
         printBackground: true,
         preferCSSPageSize: true,
         width: options.width ? `${options.width}mm` : undefined,
-        height: height ? (options.height == 'auto' ? `${height + 1}px` : `${height}mm`) : undefined,
+        height: height ? (options.height == 'auto' ? `${height + 2}px` : `${height}mm`) : undefined,
         margin: {
           top: '0mm',
           right: '0mm',