build(deps): bump attrs from 23.1.0 to 23.2.0

Bumps [attrs](https://github.com/sponsors/hynek) from 23.1.0 to 23.2.0.
- [Commits](https://github.com/sponsors/hynek/commits)

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

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

requirements.txt

@@ -9,7 +9,7 @@ git+https://github.com/snarfed/mox3.git#egg=mox3
 git+https://github.com/snarfed/negotiator.git@py3#egg=negotiator
 git+https://github.com/snarfed/oauth-dropins.git#egg=oauth_dropins
 
-attrs==23.1.0
+attrs==23.2.0
 bases==0.3.0
 beautifulsoup4==4.12.2
 bech32==1.2.0