Updated docs links

refs #9742

- Ghost 2.0 is coming
- all doc links in 1.0 must use concrete links e.g. docs.ghost.org/v1 or themes.ghost.org/v1.23.0/
- if we release Ghost 2.0, docs.ghost.org will show 2.0 docs

ghost/zip/test/fixtures/test-theme/README.md

@@ -12,7 +12,7 @@ The default theme for [Ghost](http://github.com/tryghost/ghost/). This is the la
 
 Ghost uses a simple templating language called [Handlebars](http://handlebarsjs.com/) for its themes.
 
-We've documented our default theme pretty heavily so that it should be fairly easy to work out what's going on just by reading the code and the comments. Once you feel comfortable with how everything works, we also have full [theme API documentation](https://themes.ghost.org) which explains every possible Handlebars helper and template.
+We've documented our default theme pretty heavily so that it should be fairly easy to work out what's going on just by reading the code and the comments. Once you feel comfortable with how everything works, we also have full [theme API documentation](https://themes.ghost.org/v1.23.0/) which explains every possible Handlebars helper and template.
 
 **The main files are:**