Update list of projects (#431)

Author: jarrodmillman

content/maintenance/_index.md

@@ -9,11 +9,26 @@ This work is generally along one of three directions: tool building, maintenance
 
 We maintain a collection of tools, small and large, that help projects across the ecosystem:
 
-- [attach-next-milestone](https://github.com/scientific-python/attach-next-milestone)
-- [lazy_loader](https://github.com/scientific-python/lazy_loader/)
+### Web theme
+
 - [scientific-python-hugo-theme](https://github.com/scientific-python/scientific-python-hugo-theme)
+
+### Python packages
+
+- [lazy_loader](https://github.com/scientific-python/lazy_loader/)
 - [spin](https://github.com/scientific-python/spin)
 - [yaml2ics](https://github.com/scientific-python/yaml2ics)
+- [devstats](https://github.com/scientific-python/devstats)
+- [pytest-doctestplus](https://github.com/scientific-python/pytest-doctestplus)
+- [repo-review](https://github.com/scientific-python/repo-review)
+- [changelist](https://github.com/scientific-python/changelist/)
+
+### Actions
+
+- [upload-nightly-action](https://github.com/scientific-python/upload-nightly-action)
+- [attach-next-milestone-action](https://github.com/scientific-python/attach-next-milestone-action)
+- [invite-new-members-action](https://github.com/scientific-python/invite-new-members-action)
+- [reverse-dependency-testing](https://github.com/scientific-python/reverse-dependency-testing)
 
 ## Maintenance?