Update python-slugify requirement from ~=5.0.2 to ~=6.1.2 in /api

Updates the requirements on [python-slugify](https://github.com/un33k/python-slugify) to permit the latest version.
- [Release notes](https://github.com/un33k/python-slugify/releases)
- [Changelog](https://github.com/un33k/python-slugify/blob/master/CHANGELOG.md)
- [Commits](https://github.com/un33k/python-slugify/compare/5.0.2...v6.1.2)

---
updated-dependencies:
- dependency-name: python-slugify
  dependency-type: direct:production
...

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

api/requirements.txt

@@ -3,7 +3,7 @@ sanic~=22.6.0
 oic~=1.3.0
 sanic-session~=0.8.0
 sanic-cors~=2.0.1
-python-slugify~=5.0.2
+python-slugify~=6.1.2
 motor~=3.0.0
 pyyaml<6
 -e git+https://github.com/openmaptiles/openmaptiles-tools#egg=openmaptiles-tools

api/setup.py

@@ -15,7 +15,7 @@ setup(
         "oic>=1.3.0, <2",
         "sanic-session~=0.8.0",
         "sanic-cors~=2.0.1",
-        "python-slugify~=5.0.2",
+        "python-slugify>=5.0.2,<6.2.0",
         "motor>=2.5.1,<3.1.0",
         "pyyaml<6",
         "sqlparse~=0.4.2",