Bump psycopg from 3.1.2 to 3.1.8

Bumps [psycopg](https://github.com/psycopg/psycopg) from 3.1.2 to 3.1.8.
- [Release notes](https://github.com/psycopg/psycopg/releases)
- [Changelog](https://github.com/psycopg/psycopg/blob/master/docs/news.rst)
- [Commits](psycopg/psycopg@3.1.2...3.1.8)

---
updated-dependencies:
- dependency-name: psycopg
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

setup.py

@@ -94,7 +94,7 @@ def get_version(version_file):
         "boto3 == 1.24.82",
         "docopt == 0.6.2",
         "ec2-metadata == 2.10.0",
-        "psycopg == 3.1.2",
+        "psycopg == 3.1.8",
         "schema == 0.7.5",
         "setuptools >= 24.2.0",
     ],