Merge branch 'main' into doc/2809-create-array-data

Author: jhamman

.github/ISSUE_TEMPLATE/config.yml

@@ -5,7 +5,7 @@ contact_links:
     about: A new major feature should be discussed in the Zarr specifications repository.
   - name: Discuss something on ZulipChat
     url: https://ossci.zulipchat.com/
-    about: For questions like "How do I do X with Zarr?", you can move to our ZulipChat.
+    about: For questions like "How do I do X with Zarr?", consider posting your question to our developer chat.
   - name: Discuss something on GitHub Discussions
     url: https://github.com/zarr-developers/zarr-python/discussions
     about: For questions like "How do I do X with Zarr?", you can move to GitHub Discussions.

README.md

@@ -70,7 +70,7 @@
   </td>
 </tr>
 <tr>
-	<td>Zulip</td>
+	<td>Developer Chat</td>
 	<td>
 		<a href="https://ossci.zulipchat.com/">
 		<img src="https://img.shields.io/badge/zulip-join_chat-brightgreen.svg" />

changes/2665.feature.rst

@@ -0,0 +1 @@
+Restore functionality of `del z.attrs['key']` to actually delete the key.

changes/2796.chore.rst

@@ -20,7 +20,7 @@ Zarr-Python
 **Useful links**:
 `Source Repository <https://github.com/zarr-developers/zarr-python>`_ |
 `Issue Tracker <https://github.com/zarr-developers/zarr-python/issues>`_ |
-`Zulip Chat <https://ossci.zulipchat.com/>`_ |
+`Developer Chat <https://ossci.zulipchat.com/>`_ |
 `Zarr specifications <https://zarr-specs.readthedocs.io>`_
 
 Zarr-Python is a Python library for reading and writing Zarr groups and arrays. Highlights include: