[x/go.dev] change to Tour of Go

Change-Id: I5f67d93dc5f901b23cf828653b413436b33d0ef5

X-GoDev-Commit: d56e37964435f8acf3e75fbd73f6738d5a1d4cbb
diff --git a/go.dev/data/learn/quickstart.yaml b/go.dev/data/learn/quickstart.yaml
index e2ea950..0578bb7 100644
--- a/go.dev/data/learn/quickstart.yaml
+++ b/go.dev/data/learn/quickstart.yaml
@@ -4,7 +4,7 @@
       or brush up for your existing Go code.
     cta: View documentation
     url: https://golang.org/doc/install
-  - title: Tour Go
+  - title: Tour of Go
     content: An interactive introduction to Go in three sections. Each section
       concludes with a few exercises so you can practice what you've learned.
     cta: Take a tour