Update repro_intro.qmd date mistake (I think)

I think that you meant to write 2018 instead of 2017 there

Author: alsanzgarcia

repro_intro.qmd

@@ -630,7 +630,7 @@ packages, and hope that everything goes well), but for this you need to at least
 know roughly *when* that script was written. Let’s say that you know that
 this script was written back in 2017, somewhere around October. If you know
 that, you can use the `{rang}` or `{groundhog}` packages to download the
-packages as of October 2018 in a separate library and then run your script.
+packages as of October 2017 in a separate library and then run your script.
 
 `{rang}` is fairly recent as of writing (February 2023) so I won’t go into too
 much detail now, as it is likely that the package will keep evolving rapidly in