Add the logo (dependabot#64)

My inner marketer prefers having a logo here...

Author: jeffwidman

README.md

@@ -1,4 +1,12 @@
+<h1 align="center">
+    <picture>
+        <source media="(prefers-color-scheme: light)" srcset="https://user-images.githubusercontent.com/7659/174594540-5e29e523-396a-465b-9a6e-6cab5b15a568.svg">
+        <source media="(prefers-color-scheme: dark)" srcset="https://user-images.githubusercontent.com/7659/174594559-0b3ddaa7-e75b-4f10-9dee-b51431a9fd4c.svg">
+        <img src="https://user-images.githubusercontent.com/7659/174594540-5e29e523-396a-465b-9a6e-6cab5b15a568.svg" alt="Dependabot" width="336">
+    </picture>
+</h1>
+
 # Dependabot Demo Repository
 
 This repo contains some projects with outdated dependencies. Fork it to try out
-Dependabot!
+Dependabot :dependabot:!