Update dependency grpcio to v1.73.0

Author: renovate[bot]

requirements-dev.txt

@@ -77,7 +77,7 @@ googleapis-common-protos==1.56.1
     # via
     #   a3m (setup.py)
     #   grpcio-status
-grpcio==1.46.3
+grpcio==1.73.0
     # via
     #   a3m (setup.py)
     #   grpcio-reflection

requirements.txt

@@ -40,7 +40,7 @@ googleapis-common-protos==1.56.1
     # via
     #   a3m (setup.py)
     #   grpcio-status
-grpcio==1.46.3
+grpcio==1.73.0
     # via
     #   a3m (setup.py)
     #   grpcio-reflection

setup.cfg

@@ -55,7 +55,7 @@ install_requires =
     boto3~=1.20
     # MCPServer
     jsonschema~=4.3
-    grpcio~=1.46.3
+    grpcio~=1.73.0
     grpcio-reflection~=1.46.3
     grpcio-status~=1.46.3
     googleapis-common-protos~=1.56.1