Build: Bump fastavro from 1.11.1 to 1.12.0

Bumps [fastavro](https://github.com/fastavro/fastavro) from 1.11.1 to 1.12.0.
- [Release notes](https://github.com/fastavro/fastavro/releases)
- [Changelog](https://github.com/fastavro/fastavro/blob/master/ChangeLog)
- [Commits](fastavro/fastavro@1.11.1...1.12.0)

---
updated-dependencies:
- dependency-name: fastavro
  dependency-version: 1.12.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -93,7 +93,7 @@ pytest = "7.4.4"
 pytest-checkdocs = "2.13.0"
 pytest-lazy-fixture = "0.6.3"
 pre-commit = "4.2.0"
-fastavro = "1.11.1"
+fastavro = "1.12.0"
 coverage = { version = "^7.4.2", extras = ["toml"] }
 requests-mock = "1.12.1"
 moto = { version = "^5.0.2", extras = ["server"] }