Update README.md: link to GitHub action section

Author: arjun-menon

README.md

@@ -16,8 +16,8 @@ a word that may be translated to [illustriousness](https://m.interglot.com/en/es
 
 A key design aspect of Alteza is writing little scripts and executing such code to generate your website. Your static
 site can contain arbitrary Python that is executed at the time of site generation. [PyPage](https://github.com/arjun-menon/pypage),
-in particular, makes it seamless to include actual Python code inside page templates. (This of
-course means that you must run Alteza with trusted code, or in an isolated container.)
+in particular, makes it seamless to include actual Python code inside page templates. (This of course means that you
+must run Alteza with trusted code, or in an isolated container. For example, in a [GitHub action](#github-action)–see instructions below.)
 
 ## User Guide