fix link to instrumentation

diff --git a/Doc/whatsnew/3.6.rst b/Doc/whatsnew/3.6.rst
index 59ac332c94c74aaa91a4507d8e6d902a49886776..e6d39735bf85fdcc5cde9ec75ee6a75b4d083a4a 100644 (file)
--- a/Doc/whatsnew/3.6.rst
+++ b/Doc/whatsnew/3.6.rst
@@ -423,7 +423,7 @@ This can be used to instrument running interpreters in production,
 without the need to recompile specific debug builds or providing
 application-specific profiling/debugging code.
 
-More details in:ref:`instrumentation`.
+More details in :ref:`instrumentation`.
 
 The current implementation is tested on Linux and macOS.  Additional
 markers may be added in the future.