Typo: move "for"

Author: SSteve

chapter_10_production_readiness.asciidoc

@@ -136,7 +136,7 @@ There are many ways to serve them in production:
 you can use a web server like Nginx, or a CDN like Amazon S3,
 but in our case, the most straightforward thing to do
 is to use https://whitenoise.readthedocs.io/[Whitenoise],
-a Python library for expressly designed serving staticfootnote:[
+a Python library expressly designed for serving staticfootnote:[
 Believe it or not, this pun didn't actually hit me until I was rewriting this chapter.
 For 10 years it was right under my nose. I think that makes it funnier actually.]
 files from Python.