Fix changelog formatting.

Author: joaander

CHANGELOG.rst

@@ -13,7 +13,7 @@ Change Log
   (`#2015 <https://github.com/glotzerlab/hoomd-blue/pull/2015>`__).
 * Compile without errors or warnings with CUDA 12.8
   (`#2019 <https://github.com/glotzerlab/hoomd-blue/pull/2019>`__).
-* `force.Active` applies torques correctly when the filter is not `All`
+* ``force.Active`` applies torques correctly when the filter is not ``All``
   (`#2020 <https://github.com/glotzerlab/hoomd-blue/pull/2020>`__).
 * MD integrators no longer integrate the z degree of freedom in 2D simulation boxes
   (`#2021 <https://github.com/glotzerlab/hoomd-blue/pull/2021>`__).