(chore): generate 0.12.3 release notes (#2154)

Author: ilan-gold

docs/conf.py

@@ -133,7 +133,8 @@ def res(
     numpy=("https://numpy.org/doc/stable", None),
     obstore=("https://developmentseed.org/obstore/latest/", None),
     pandas=("https://pandas.pydata.org/pandas-docs/stable", None),
-    python=("https://docs.python.org/3", None),
+    # TODO: switch to `/3` once docs are built with Python 3.14
+    python=("https://docs.python.org/3.13", None),
     scipy=("https://docs.scipy.org/doc/scipy", None),
     sklearn=("https://scikit-learn.org/stable", None),
     xarray=("https://docs.xarray.dev/en/stable", None),

docs/release-notes/0.12.3.md

@@ -0,0 +1,14 @@
+(v0.12.3)=
+### 0.12.3 {small}`2025-10-16`
+
+#### Miscellaneous changes
+
+- Deprecate `AnnData.*_keys()` methods. {user}`flying-sheep` ({pr}`2102`)
+
+#### Bug fixes
+
+- Deprecate `__version__` and use standard {func}`~importlib.metadata.version` API {user}`flying-sheep` ({pr}`1318`)
+- Allow writing of views of {class}`dask.array.Array` {user}`ilan-gold` ({pr}`2084`)
+- Enable writing of views of {class}`~anndata.AnnData` in backed mode {user}`ilan-gold` ({pr}`2092`)
+- Reallow writing of keys in `h5ad` files with forward slashes instead of erroring.  Now a warning will be raised that the behavior will be disallowed in the future.  To enable the new behavior, use {attr}`anndata.settings.disallow_forward_slash_in_h5ad`. {user}`ilan-gold` ({pr}`2097`)
+- Respect off-axis merge options in {func}`anndata.experimental.concat_on_disk` {user}`ilan-gold` ({pr}`2122`)