Merge pull request #4507 from segmentio/bug-4506

Fix spelling error

Author: forstisabella

src/getting-started/03-planning-full-install.md

@@ -47,7 +47,7 @@ As an example, you might end up with a list like this:
 - Link Clicked
 - Article Completed
 - Campaign Opened
-- From Initiated
+- Form Initiated
 - Form Submitted
 - User Signed Up