Update protobuf dependency from >=4.21.6,<6 to >=5.29.2,<7

Signed-off-by: camille-bouvy-frequenz <[email protected]>

Author: camille-bouvy-frequenz

pyproject.toml

@@ -28,7 +28,7 @@ requires-python = ">= 3.11, < 4"
 dependencies = [
   "frequenz-channels >= 1.6.1, < 2",
   "grpcio >= 1.54.2, < 2",
-  "protobuf >= 4.21.6, < 6",
+  "protobuf >= 5.29.2, < 7",
   "typing-extensions >= 4.5.0, < 5",
 ]
 dynamic = ["version"]