Bump grpcio version

This is needed to be compatible with repo-config v0.4.0.

Signed-off-by: Leandro Lucarella <luca-frequenz@llucax.com>

Author: llucax

pyproject.toml

@@ -28,7 +28,7 @@ requires-python = ">= 3.11, < 4"
 dependencies = [
   "frequenz-api-common >= 0.3.0, < 0.4",
   "googleapis-common-protos >= 1.56.2, < 2",
-  "grpcio >= 1.47.0, < 2",
+  "grpcio >= 1.51.1, < 2",
 ]
 dynamic = ["version"]