Regress HISTORYold.md to avoid new PR detection

coatless · web-flow · commit 7a663287e211 · 2023-10-06T09:39:03.000-07:00
diff --git a/tools/HISTORYold.md b/tools/HISTORYold.md
@@ -1,5 +1,5 @@
-### ensmallen 2.20.0: "Stripped Bolt Head"
-###### 2023-10-02
+### ensmallen ?.??.?: "???"
+###### ????-??-??
  * Implementation of Active CMAES
    ([#367](https://github.com/mlpack/ensmallen/pull/367)).
 
