Bump fastapi in /{{cookiecutter.project_slug}}/backend (#159)

Bumps [fastapi](https://github.com/tiangolo/fastapi) from 0.63.0 to 0.65.2.
- [Release notes](https://github.com/tiangolo/fastapi/releases)
- [Commits](fastapi/fastapi@0.63.0...0.65.2)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-type: direct:production
...

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Author: dependabot[bot]

{{cookiecutter.project_slug}}/backend/requirements.txt

@@ -1,6 +1,6 @@
 alembic==1.4.3
 Authlib==0.14.3
-fastapi==0.63.0
+fastapi==0.65.2
 celery==5.0.0
 redis==3.5.3
 httpx==0.15.5