Update dependency com.google.guava:guava-bom to v33.4.8-jre

Author: renovate[bot]

build.gradle

@@ -14,7 +14,7 @@ buildscript {
         grpcVersion = '1.63.0'
 
         // https://github.com/google/guava/releases
-        guavaVersion = '33.2.1-jre'
+        guavaVersion = '33.4.8-jre'
         // https://github.com/protocolbuffers/protobuf/releases
         protobufVersion = '3.25.3'
         protobufGradlePluginVersion = '0.9.4'