DOC: Fixed typo in x2pdf section (#101)

Co-authored-by: Lucas Cimon <[email protected]>

Author: shirsakm

docs/user/subcommand-x2pdf.md

@@ -40,7 +40,7 @@ $ ls -lh
 ### Multiple files manually
 
 ```
-$ pdfly x2pdf image1.jpg image2.jgp -o out.pdf
+$ pdfly x2pdf image1.jpg image2.jpg -o out.pdf
 $ ls -lh
 -rw-rw-r-- 1 user user 47K Sep 17 21:49 image1.jpg
 -rw-rw-r-- 1 user user 15K Sep 17 21:49 image2.jpg