Update netlify.toml

Author: Kent C. Dodds

netlify.toml

@@ -75,3 +75,12 @@
  to = "https://testing-library.com/docs/pptr-testing-library/intro"
  status = 301
  force = true
+
+# Preact page. Hopefully it'll join this website eventually
+# but for now it'll be nice to be able to use the URL in content/twitter/etc.
+# and not have to worry about updating those URLs in the future.
+[[redirects]]
+ from = "https://testing-library.com/preact/"
+ to = "https://github.com/antsmartian/preact-testing-library"
+ status = 301
+ force = true