Bump anyio[curio,trio] in /testing/plugins_integration

Bumps [anyio[curio,trio]](https://github.com/agronholm/anyio) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/agronholm/anyio/releases)
- [Changelog](https://github.com/agronholm/anyio/blob/master/docs/versionhistory.rst)
- [Commits](agronholm/anyio@3.2.0...3.2.1)

---
updated-dependencies:
- dependency-name: anyio[curio,trio]
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

testing/plugins_integration/requirements.txt

@@ -1,4 +1,4 @@
-anyio[curio,trio]==3.2.0
+anyio[curio,trio]==3.2.1
 django==3.2.4
 pytest-asyncio==0.15.1
 pytest-bdd==4.0.2