Bazel DevSite: Add "create issue" & "view source" buttons to narrative documentation.

A future change will add the buttons to the reference docs (which is a bit more complex since there is no 1:1 relation between displayed page and source file).

PiperOrigin-RevId: 486889786
Change-Id: I2d0d1963f7c82ab7b17dbe257196e4f105fe94cb
diff --git a/site/en/tutorials/cpp-dependency.md b/site/en/tutorials/cpp-dependency.md
index 0f56fd7..5a99862 100644
--- a/site/en/tutorials/cpp-dependency.md
+++ b/site/en/tutorials/cpp-dependency.md
@@ -3,6 +3,8 @@
 
 # Review the dependency graph
 
+{% include "_buttons.html" %}
+
 A successful build has all of its dependencies explicitly stated in the `BUILD`
 file. Bazel uses those statements to create the project's dependency graph,
 which enables accurate incremental builds.