[dv/doc] updated dv_plan links to new location

Signed-off-by: Rasmus Madsen <rasmus.madsen@wdc.com>
diff --git a/hw/_index.md b/hw/_index.md
index fbac20f..3ffabf9 100644
--- a/hw/_index.md
+++ b/hw/_index.md
@@ -41,7 +41,7 @@
 
 * `top_earlgrey`
   * [Design specification]({{< relref "hw/top_earlgrey/doc" >}})
-  * [dv document]({{< relref "hw/top_earlgrey/doc/dv_doc" >}})
+  * [dv document]({{< relref "hw/top_earlgrey/doc/dv" >}})
   * [DV simulation results, with coverage (nightly)](https://reports.opentitan.org/hw/top_earlgrey/dv/latest/results.html)
   * FPV results (nightly) (TBD)
   * [AscentLint results (nightly)](https://reports.opentitan.org/hw/top_earlgrey/lint/ascentlint/latest/results.html)