go-tour: fix typos

LGTM=robert.hencke, adg
R=golang-codereviews, robert.hencke, gobot, adg
CC=golang-codereviews
https://golang.org/cl/98920043
diff --git a/TRANSLATE b/TRANSLATE
index b63e38f..8368fd4 100644
--- a/TRANSLATE
+++ b/TRANSLATE
@@ -15,7 +15,7 @@
 To translate the tour:
 
 1. Translate the files in content/
-2. Provide localized verison fo the UI strings in static/js/values.js
+2. Provide localized version for the UI strings in static/js/values.js
 3. Sign up to App Engine and create an app named go-tour-LL,
    where LL is the two-letter country code that applies best
    to your chosen language. (This shouldn't cost you anything;