Backport PR #3802 on branch 1.11.x (docs: fix sc.filter_cells return documentation typo) (#3804)

Co-authored-by: Malte Kuehl <[email protected]>

Author: meeseeksmachine

src/scanpy/preprocessing/_simple.py

@@ -109,7 +109,7 @@ def filter_cells(
         cell is kept. `False` means the cell is removed.
     number_per_cell
         Depending on what was thresholded (`counts` or `genes`),
-        the array stores `n_counts` or `n_cells` per gene.
+        the array stores `n_counts` or `n_genes` per cell.
 
     Examples
     --------