Fix relnotes

Author: flying-sheep

docs/release-notes/1.11.2.md

@@ -8,6 +8,7 @@
 - Prevent plotting with `mask_obs` from mutating data {smaller}`V Menon` ({pr}`3496`)
 - Prevent {func}`scanpy.pp.scale` from creating a dask {class}`~dask.array.Array` with {class}`numpy.matrix` chunks {smaller}`P Angerer` ({pr}`3597`)
 - Allow using {mod}`sklearn` ≥1.6, {doc}`dask:index` ≥2024.8, and `sphinx` ≥8.2.1 {smaller}`P Angerer` ({pr}`3611`)
+- Fixed handling of `ext` argument in {func}`scanpy.read` {smaller}`I Gold` {pr}`3643`
 - Fix error message when trying to use `sc.pp.pca(x, zero_center=False)` with a sparse dask array. {smaller}`P Angerer` ({pr}`3646`)
 
 ### Documentation