(chore): clean up release notes (#1698)

* (chore): clean up release notes

* (fix): remove `module`

docs/release-notes/0.11.0rc1.md

@@ -1,21 +1,21 @@
 (v0.11.0rc1)=
 ### 0.11.0rc1 {small}`2024-09-04`
 
-### Breaking changes
+#### Breaking changes
 
 - Removed deprecated modules `anndata.core` and `anndata.readwrite` {user}`ivirshup` ({pr}`1197`)
 - No longer export `sparse_dataset` from `anndata.experimental`, instead exporting {func}`anndata.io.sparse_dataset` {user}`ilan-gold` ({pr}`1642`)
 - Move `RWAble` and `InMemoryElem` out of `experimental`, renaming `RWAble` to {type}`~anndata.typing.AxisStorable` and `InMemoryElem` to {type}`~anndata.typing.RWAble` {user}`ilan-gold` ({pr}`1643`)
 
-### Development Process
+#### Development Process
 
 - create new `cupy` installation options for cuda 11 & 12 called `cu11` and `cu12` {user}`Intron7` ({pr}`1596`)
 
-### Documentation
+#### Documentation
 
 - Correct {attr}`anndata.AnnData.X` type to include {class}`~anndata.abc.CSRDataset` and {class}`~anndata.abc.CSCDataset` as possible types and being deprecation process for non-csr/csc {class}`scipy.sparse.spmatrix` types in {attr}`anndata.AnnData.X` {user}`ilan-gold` ({pr}`1616`)
 
-### Features
+#### Features
 
 - `scipy.sparse.csr_array` and `scipy.sparse.csc_array` are now supported when constructing `AnnData` objects {user}`ilan-gold` {user}`isaac-virshup` ({pr}`1028`)
 - Allow `axis` parameter of e.g. :func:`anndata.concat` to accept `'obs'` and `'var'` {user}`flying-sheep` ({pr}`1244`)

docs/release-notes/0.11.0rc2.md

@@ -1,7 +1,12 @@
 (v0.11.0rc2)=
 ### 0.11.0rc2 {small}`2024-09-24`
 
-### Development Process
+#### Development Process
 
 - Add extra `dask` dependency for installation i.e., `pip install anndata[dask]` {user}`ilan-gold` ({pr}`1677`)
 - Remove `shall_` from variable names in `settings` {user}`ilan-gold` ({pr}`1685`)
+
+#### Breaking changes
+
+- A new `anndata.io` module contains all `read_*` and `write_*` functions, and all imports of such functions should go through this module.
+Old ways of importing these functions i.e., `from anndata import read_csv` or `from anndata._io.specs import read_elem` will still work, but are now considered deprecated and give a warning on import with the exception of {func}`anndata.io.read_zarr` and {func}`anndata.io.read_h5ad`, which will remain at the top-level `anndata` without warning.  `user`{ilan-gold} ({pr}`1682`)