add forestry logo

docs/_data/sponsors.yml

@@ -1,3 +1,3 @@
 - name: Forestry.io
-  image: http://via.placeholder.com/200x100
+  image: /img/forestry-logo.png
   url: https://forestry.io

docs/_docs/contributing.md

@@ -16,7 +16,7 @@ Whether you're a developer, a designer, or just a Jekyll devotee, there are lots
 
 * [Install Jekyll on your computer](https://jekyllrb.com/docs/installation/) and kick the tires. Does it work? Does it do what you'd expect? If not, [open an issue](https://github.com/jekyll/jekyll/issues/new) and let us know.
 * Comment on some of the project's [open issues](https://github.com/jekyll/jekyll/issues). Have you experienced the same problem? Know a work around? Do you have a suggestion for how the feature could be better?
-* Read through [the documentation](https://jekyllrb.com/docs/home/), and click the "improve this page" button, any time you see something confusing, or have a suggestion on how to improve something.
+* Read through [the documentation](https://jekyllrb.com/docs/home/), and click the "improve this page" button, any time you see something confusing, or have a suggestion for something that could be improved.
 * Browse through [the Jekyll discussion forum](https://talk.jekyllrb.com/), and lend a hand answering questions. There's a good chance you've already experienced what another user is experiencing.
 * Find [an open issue](https://github.com/jekyll/jekyll/issues) (especially [those labeled `help-wanted`](https://github.com/jekyll/jekyll/issues?q=is%3Aopen+is%3Aissue+label%3Ahelp-wanted)), and submit a proposed fix. If it's your first pull request, we promise we won't bite, and are glad to answer any questions.
 * Help evaluate [open pull requests](https://github.com/jekyll/jekyll/pulls), by testing the changes locally and reviewing what's proposed.

docs/_includes/footer.html

@@ -16,7 +16,7 @@
         Sponsored by
         {% for sponsor in site.data.sponsors %}
           <a href="{{ sponsor.url }}">
-            <img src="{{ sponsor.image }}" width="100" height="30" alt="{{ sponsor.name }}">
+            <img src="{{ sponsor.image }}" width="120" height="30" alt="{{ sponsor.name }}">
           </a>
         {% endfor %}
       </p>