Convert changes to markdown

Author: maxrjones

changes/2774.feature.rst changes/2774.feature.mdchanges/2774.feature.rst renamed to changes/2774.feature.md

@@ -6,4 +6,4 @@ variable-length string data type, but the old metadata representation can still
 used when reading arrays. The logic for automatically choosing the chunk encoding for a given data
 type has also changed, and this necessitated changes to the ``config`` API.
 
-For more on this new feature, see the `documentation </user-guide/data_types.html>`_
+For more on this new feature, see the [documentation](user-guide/data_types.md

changes/2871.feature.rst changes/2871.feature.mdchanges/2871.feature.rst renamed to changes/2871.feature.md

@@ -1 +1 @@
-Fix `zarr.open` default for argument `mode` when `store` is `read_only`
+Fix `zarr.open` default for argument `mode` when `store` is `read_only`.

changes/2874.feature.rst changes/2874.feature.mdchanges/2874.feature.rst renamed to changes/2874.feature.md

@@ -0,0 +1 @@
+Port more stateful testing actions from [Icechunk](https://icechunk.io).