fix contents in 2.16.3 release notes (again)

docs/releases/2.16.3.md

@@ -2,10 +2,11 @@
 
 _September 5, 2022_
 
-```eval-rst
-.. contents::
-    :local:
-    :depth: 1
+```{contents}
+---
+local:
+depth: 1
+---
 ```
 
 ## What's new