docs: update changelog for buffer optimization

Add changelog entry documenting the performance optimization of buffer
array allocations. The change uses np.asarray() instead of np.array()
to avoid unnecessary copies when input is already a numpy array.

This optimization provides significant performance improvements in
reinforcement learning training loops with minimal risk as it maintains
identical functional behavior.

Author: sxngt

docs/misc/changelog.rst

@@ -35,6 +35,7 @@ Deprecations:
 
 Others:
 ^^^^^^^
+- Performance optimization: Use ``np.asarray()`` instead of ``np.array()`` in ``ReplayBuffer`` and ``RolloutBuffer`` to avoid unnecessary array copies (@sxngt)
 
 Documentation:
 ^^^^^^^^^^^^^^
@@ -1844,4 +1845,4 @@ And all the contributors:
 @DavyMorgan @luizapozzobon @Bonifatius94 @theSquaredError @harveybellini @DavyMorgan @FieteO @jonasreiher @npit @WeberSamuel @troiganto
 @lutogniew @lbergmann1 @lukashass @BertrandDecoster @pseudo-rnd-thoughts @stefanbschneider @kyle-he @PatrickHelm @corentinlger
 @marekm4 @stagoverflow @rushitnshah @markscsmith @NickLucche @cschindlbeck @peteole @jak3122 @will-maclean
-@brn-dev @jmacglashan @kplers @MarcDcls @chrisgao99 @pstahlhofen @akanto
+@brn-dev @jmacglashan @kplers @MarcDcls @chrisgao99 @pstahlhofen @akanto @sxngt