Bump psycopg2-binary from 2.9.8 to 2.9.9 in /requirements

Bumps [psycopg2-binary](https://github.com/psycopg/psycopg2) from 2.9.8 to 2.9.9.
- [Changelog](https://github.com/psycopg/psycopg2/blob/master/NEWS)
- [Commits](psycopg/psycopg2@2.9.8...2.9.9)

---
updated-dependencies:
- dependency-name: psycopg2-binary
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

requirements/postgres.txt

@@ -1,4 +1,4 @@
 # DEV: Replace this with `psycopg[binary]` when the minimum required Django version is
 #      4.2 or higher, as this is likely to be deprecated in the future
 #      (see https://docs.djangoproject.com/en/4.2/releases/4.2/#psycopg-3-support)
-psycopg2-binary==2.9.8
+psycopg2-binary==2.9.9