Bump aiosignal from 1.2.0 to 1.3.1 in /training

Bumps [aiosignal](https://github.com/aio-libs/aiosignal) from 1.2.0 to 1.3.1.
- [Release notes](https://github.com/aio-libs/aiosignal/releases)
- [Changelog](https://github.com/aio-libs/aiosignal/blob/master/CHANGES.rst)
- [Commits](aio-libs/aiosignal@v1.2.0...v1.3.1)

---
updated-dependencies:
- dependency-name: aiosignal
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

training/requirements.txt

@@ -1,5 +1,5 @@
 aiohttp==3.8.5
-aiosignal==1.2.0
+aiosignal==1.3.1
 appdirs==1.4.4
 asttokens==2.4.0
 async-timeout==4.0.2