chore(deps): Bump grpc from 1.70.0 to 1.71.0 in /pbj-core/hiero-dependency-versions (#410)

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pbj-core/hiero-dependency-versions/build.gradle.kts

@@ -9,7 +9,7 @@ plugins {
 group = "com.hedera.hashgraph"
 
 val antlr = "4.13.2"
-val grpc = "1.70.0"
+val grpc = "1.71.0"
 val helidon = "4.1.7"
 val protobuf = "4.29.3"