Merge branch 'migrate-to-system.text.json' of https://github.com/hard…

…koded/puppeteer-sharp into migrate-to-system.text.json

README.md

@@ -90,7 +90,7 @@ await page.GoToAsync("http://www.google.com"); // In case of fonts being loaded
 await page.EvaluateExpressionHandleAsync("document.fonts.ready"); // Wait for fonts to be loaded. Omitting this might result in no text rendered in pdf.
 await page.PdfAsync(outputFile);
 ```
-<sup><a href='https://github.com/hardkoded/puppeteer-sharp/blob/master/lib/PuppeteerSharp.Tests/PageTests/PdfTests.cs#L24-L34' title='Snippet source file'>snippet source</a> | <a href='#snippet-PdfAsync' title='Start of snippet'>anchor</a></sup>
+<sup><a href='https://github.com/hardkoded/puppeteer-sharp/blob/master/lib/PuppeteerSharp.Tests/PageTests/PdfTests.cs#L23-L33' title='Snippet source file'>snippet source</a> | <a href='#snippet-PdfAsync' title='Start of snippet'>anchor</a></sup>
 <!-- endSnippet -->
 
 ### Inject HTML