Fix recommended rules block in external BE.

RELNOTES:
PiperOrigin-RevId: 312052011
diff --git a/src/main/java/com/google/devtools/build/docgen/templates/be/overview.vm b/src/main/java/com/google/devtools/build/docgen/templates/be/overview.vm
index cddcdce..1b34d75 100644
--- a/src/main/java/com/google/devtools/build/docgen/templates/be/overview.vm
+++ b/src/main/java/com/google/devtools/build/docgen/templates/be/overview.vm
@@ -47,9 +47,8 @@
 Native rules are available globally in BUILD files. In .bzl files, you can find them in
 the <code>native</code> module.
 
- -->
 For non-native Starlark rules that ship separately from Bazel, see the list of
-<a href="rules.html#recommended-rules">Recommended Rules</a>.
+<a href="../rules.html#recommended-rules">Recommended Rules</a>.
 
 <h3>Language-specific native rules</h3>