Update README.md

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

README.md

@@ -132,7 +132,8 @@ files/galaxy/static
 │       └── <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.  
+
+Where 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.  
 Which subdirectories and files are copied is managed by the `static_galaxy_themes_keys` variable.
 
 Also make sure that you set `galaxy_themes_welcome_url_prefix`, so your welcome pages are templated correctly.