Add an AnyIO sprint

Author: agronholm

src/content/sprints/anyio.md

@@ -0,0 +1,17 @@
+---
+title: "AnyIO"
+numberOfPeople: "2-8"
+pythonLevel: "Intermediate"
+contactPerson:
+  name: "Alex Grönholm"
+  email: "[email protected]"
+  github: "agronholm"
+links:
+  - title: "GitHub repo"
+    url: "https://github.com/agronholm/anyio"
+  - title: "Gitter chat"
+    url: "https://matrix.to/#/#python-trio_AnyIO:gitter.im"
+---
+
+We'll mostly work on improving the documentation, in particular adding guides for migrating existing asyncio or Trio apps and libraries to the AnyIO API.
+If you have a pet peeve with AnyIO, or would just like to ask questions or get help with your AnyIO migration, feel free to join!