Update sqlalchemy[asyncio] requirement from ~=1.4.32 to ~=1.4.39 in /api

Updates the requirements on [sqlalchemy[asyncio]](https://github.com/sqlalchemy/sqlalchemy) to permit the latest version.
- [Release notes](https://github.com/sqlalchemy/sqlalchemy/releases)
- [Changelog](https://github.com/sqlalchemy/sqlalchemy/blob/main/CHANGES.rst)
- [Commits](https://github.com/sqlalchemy/sqlalchemy/commits)

---
updated-dependencies:
- dependency-name: sqlalchemy[asyncio]
  dependency-type: direct:production
...

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

api/requirements.txt

@@ -8,7 +8,7 @@ motor~=2.5.1
 pyyaml<6
 -e git+https://github.com/openmaptiles/openmaptiles-tools#egg=openmaptiles-tools
 sqlparse~=0.4.2
-sqlalchemy[asyncio]~=1.4.32
+sqlalchemy[asyncio]~=1.4.39
 asyncpg~=0.24.0
 pyshp~=2.3.1
 alembic~=1.7.7