TBR website: Change a couple links away from v.io

It now points to vanadium.github.io

Tested locally using `make serve` and visiting those pages.

Change-Id: I256fb54577e6a25ab9e1982e4ac79b89fd9a63ec
diff --git a/content/tos.md b/content/tos.md
index a29346a..d723fe6 100644
--- a/content/tos.md
+++ b/content/tos.md
@@ -2,12 +2,12 @@
 title: Terms of Service
 = yaml =
 
-The Vanadium website, [v.io], (the "Website") and [Vanadium Cloud Services] (the
+The Vanadium website, [vanadium.github.io], (the "Website") and [Vanadium Cloud Services] (the
 "Services") are hosted by Google. By using and/or visiting the Website and/or
 Services, you consent to be bound by Google's general [Terms of Service], the
 [Google APIs Terms of Service], and Google's general [Privacy Policy].
 
-[v.io]: https://v.io
+[vanadium.github.io]: https://vanadium.github.io
 [Vanadium Cloud Services]: tools/services.html
 [Terms of Service]: https://www.google.com/intl/en/policies/terms/
 [Google APIs Terms of Service]: https://developers.google.com/terms/
diff --git a/content/tutorials/checkup.md b/content/tutorials/checkup.md
index 2ddf3d8..5236cc6 100644
--- a/content/tutorials/checkup.md
+++ b/content/tutorials/checkup.md
@@ -16,7 +16,7 @@
 ```
 function bad_vanadium() {
   echo '
-  Per https://v.io/installation/, either
+  Per https://vanadium.github.io/installation, either
 
     export V23_RELEASE={your installation directory}