Bump fastapi from 0.79.1 to 0.121.3

Bumps [fastapi](https://github.com/fastapi/fastapi) from 0.79.1 to 0.121.3.
- [Release notes](https://github.com/fastapi/fastapi/releases)
- [Commits](fastapi/fastapi@0.79.1...0.121.3)

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.121.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

backend/requirements.txt

@@ -16,9 +16,9 @@ distlib==0.3.6 ; python_version >= "3.8" and python_version < "4.0" \
 fastapi-utils==0.2.1 ; python_version >= "3.8" and python_version < "4.0" \
     --hash=sha256:0e6c7fc1870b80e681494957abf65d4f4f42f4c7f70005918e9181b22f1bd759 \
     --hash=sha256:dd0be7dc7f03fa681b25487a206651d99f2330d5a567fb8ab6cb5f8a06a29360
-fastapi==0.79.1 ; python_version >= "3.8" and python_version < "4.0" \
-    --hash=sha256:006862dec0f0f5683ac21fb0864af2ff12a931e7ba18920f28cc8eceed51896b \
-    --hash=sha256:3c584179c64e265749e88221c860520fc512ea37e253282dab378cc503dfd7fd
+fastapi==0.121.3 ; python_version >= "3.8" and python_version < "4.0" \
+    --hash=sha256:0055bc24fe53e56a40e9e0ad1ae2baa81622c406e548e501e717634e2dfbc40b \
+    --hash=sha256:0c78fc87587fcd910ca1bbf5bc8ba37b80e119b388a7206b39f0ecc95ebf53e9
 filelock==3.8.2 ; python_version >= "3.8" and python_version < "4.0" \
     --hash=sha256:7565f628ea56bfcd8e54e42bdc55da899c85c1abfe1b5bcfd147e9188cebb3b2 \
     --hash=sha256:8df285554452285f79c035efb0c861eb33a4bcfa5b7a137016e32e6a90f9792c