Add missing note about protobuf/grpcio dependency bump

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

RELEASE_NOTES.md

@@ -53,6 +53,8 @@
     + `microgrid.components.ComponentErrorCode` (`microgrid.electrical_components.ElectricalComponentDiagnosticCode`)
     + `metrics.Metric`
 
+- The minimum allowed version of `protobuf` and `grpcio` has been updated to 6.31.1 and 1.72.1 respectively, you might also need to bump your dependencies accordingly.
+
 ## New Features
 
 Added many new messages and enum values: