chore: update changelog and release instructions

Author: maartenbreddels

docs/source/changelog.md

@@ -2,6 +2,14 @@
 
 This is a summary of changes in ipywidgets releases. For more detailed information, see the issues and pull requests for the appropriate milestone on [GitHub](https://github.com/jupyter-widgets/ipywidgets).
 
+## 8.0.6
+
+Highlights include:
+
+ - Fix: revert removing ipykernel dependency [#3749](https://github.com/jupyter-widgets/ipywidgets/pull/3749)
+ - Fix: structuredClone broke default serializer that depended on JSON/toJSON [#3738](https://github.com/jupyter-widgets/ipywidgets/pull/3738)
+ - Fix: comm/ipykernel/manager runtime issues: [#3740](https://github.com/jupyter-widgets/ipywidgets/pull/3740), [#3737](https://github.com/jupyter-widgets/ipywidgets/pull/3737)
+
 ## 8.0.5
 
 Highlights include:

docs/source/dev_release.md

@@ -124,8 +124,11 @@ Using the above script, you can do:
 Commit the changes you've made above, and include the uploaded files hashes in the commit message. Tag the release if ipywidgets was released. Push to origin `main` (and include the tag in the push), e.g:
 
 ```
-git tag 8.0.5
-git push origin main 8.0.5
+git add -p
+git commit -m "Release: ipywidgets 8.0.6, widgetsnbextension 4.0.7, jupyterlab_widgets 3.0.7"
+git commit --amend
+git tag 8.0.6
+git push origin main 8.0.6
 ```
 
 Update conda-forge packages (if the requirements changed to ipywidgets, make sure to update widgetsnbextension first).