added release note

Author: Intron7

docs/release-notes/0.15.0.md

@@ -1,5 +1,9 @@
 ### 0.15.0 {small}`the-future`
 
+```{rubric} Features
+```
+* Allow multiple control groups in ``onesided_distances`` for computing energy distances against several references in a single kernel launch {pr}`601` {smaller}`S Dicks`
+
 ```{rubric} Bug fixes
 ```
 * Fix multi-GPU ``cudaErrorLaunchFailure`` during cross-device result aggregation when using RMM without pool allocation for very large datasets {pr}`594` {smaller}`S Dicks`

src/rapids_singlecell/pertpy_gpu/_distance.py

@@ -232,7 +232,7 @@ def onesided_distances(
         self,
         adata: AnnData,
         groupby: str,
-        selected_group: str,
+        selected_group: Sequence[str] | str,
         *,
         groups: Sequence[str] | None = None,
         bootstrap: bool = False,