Bump python-decouple from 3.7 to 3.8 in /ingestion_server (#835)

Bumps [python-decouple](https://github.com/henriquebastos/python-decouple) from 3.7 to 3.8.
- [Release notes](https://github.com/henriquebastos/python-decouple/releases)
- [Changelog](https://github.com/HBNetwork/python-decouple/blob/master/CHANGELOG.md)
- [Commits](HBNetwork/python-decouple@v3.7...v3.8)

---
updated-dependencies:
- dependency-name: python-decouple
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

ingestion_server/Pipfile

@@ -20,7 +20,7 @@ filelock = "~=3.9"
 gunicorn = "~=20.1"
 jsonschema = "~=4.17"
 psycopg2 = "~=2.9"
-python-decouple = "~=3.7"
+python-decouple = "~=3.8"
 PyYAML = "~=6.0"
 tldextract = "~=3.3"