Merge pull request #994: [proxima-beam] bump beam to 2.66.0

Author: je-ik

buildSrc/src/main/groovy/cz.o2.proxima.java-conventions.gradle

@@ -24,10 +24,10 @@ plugins {
 java.sourceCompatibility = JavaVersion.VERSION_11
 
 def auto_service_version = "1.1.1"
-def beam_version = "2.65.0"
+def beam_version = "2.66.0"
 def errorprone_version = "2.18.0"
 def flink_version = "1.18.0"
-def grpc_version = "1.69.0"
+def grpc_version = "1.70.0"
 def groovy_version = "4.0.27"
 def guava_version = "33.1.0-jre"
 def hadoop_version = "3.2.4"