_config.yml: sync with the upstream

Author: maxim-belkin

_config.yml

@@ -32,7 +32,7 @@ repository: <USERNAME>/<PROJECT>
 email: "[email protected]"
 
 # Sites.
-amy_site: "https://amy.carpentries.org/workshops"
+amy_site: "https://amy.carpentries.org/"
 carpentries_github: "https://github.com/carpentries"
 carpentries_pages: "https://carpentries.github.io"
 carpentries_site: "https://carpentries.org/"
@@ -92,6 +92,7 @@ exclude:
   - bin/
   - .Rproj.user/
   - .vendor/
+  - vendor/
   - .docker-vendor/
 
 # Turn on built-in syntax highlighting.