Update dependency fastapi to >=0.120.3,<0.121.0

Author: renovate[bot]

setup.cfg

@@ -49,7 +49,7 @@ install_requires =
     opentelemetry-api~=1.35.0
     opentelemetry-sdk~=1.35.0
     deprecation~=2.1.0
-    fastapi>=0.115.2,<0.117.0
+    fastapi>=0.120.3,<0.121.0
     uvicorn[standard]>=0.34.0,<0.36.0
     # OpenCTI
     filigran-sseclient>=1.0.2