Update README.md

Co-authored-by: Nate Coraor <[email protected]>

README.md

@@ -129,7 +129,7 @@ files/galaxy/static
 │   │   │   └── more-static-content-2.svg
 │   │   └── welcome.html
 │   └── themes
-│       └── <subdomain-name-1>.yml
+│       └── <subdomain-name-2>.yml
 ... (and many more subdomains)
 ~~~
 Were the <subdomain-name-1> should exactly match your subdomain's name. The subdirectories `static` and `themes` are mandatory, as well as the correctly named theme file (if you enabled `galaxy_manage_themes`), while all subdirectories in `static` are optional.