Update fastapi requirement from <0.119.0,>=0.100 to >=0.100,<0.121.0

Updates the requirements on [fastapi](https://github.com/fastapi/fastapi) to permit the latest version.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.100.0...0.120.1)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.120.1
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pyproject.toml

@@ -23,7 +23,7 @@ requires-python = ">=3.8"
 dependencies = [
   # intentionally loose. perhaps these should be vendored to not collide with user code?
   "attrs>=20.1,<24",
-  "fastapi>=0.100,<0.119.0",
+  "fastapi>=0.100,<0.121.0",
   "pydantic>=1.9,<3",
   "PyYAML",
   "requests>=2,<3",