Docs: Adds a redirect to allow a shorter URL for NBU page on DAC.

Bug: 30292533
Change-Id: Ifd9ca24804d96d0e50dd0f94a028233cc2cbca4e
(cherry picked from commit 4dd89b6d86c13f170c61ca425d22e0463a81224f)
diff --git a/docs/html/_redirects.yaml b/docs/html/_redirects.yaml
index 8e6ab42..4bb6da7 100644
--- a/docs/html/_redirects.yaml
+++ b/docs/html/_redirects.yaml
@@ -23,6 +23,8 @@
   to: /studio/debug/index.html
 - from: /sdk/compatibility-library.html
   to: /topic/libraries/support-library/index.html
+- from: /billions
+  to: /topic/billions/index.html
 - from: /tools/extras/support-library.html
   to: /topic/libraries/support-library/index.html
 - from: /training/basics/fragments/support-lib.html