Update Teku to 23.6.0 (Consensys#805)

Author: jframe

acceptance-tests/src/test/java/tech/pegasys/web3signer/dsl/utils/DataStructureUtilAdapter.java

@@ -135,7 +135,7 @@ private ExecutionPayload randomExecutionPayload(final SpecVersion specVersion) {
                     .blockHash(util.randomBytes32())
                     .transactions(util.randomExecutionPayloadTransactions())
                     .withdrawals(() -> randomExecutionPayloadWithdrawals(specVersion))
-                    .excessDataGas(util::randomUInt256));
+                    .excessDataGas(util::randomUInt64));
   }
 
   private List<Withdrawal> randomExecutionPayloadWithdrawals(final SpecVersion specVersion) {

gradle/versions.gradle

@@ -87,7 +87,7 @@ dependencyManagement {
     dependency 'org.hyperledger.besu:plugin-api:22.10.3'
     dependency 'org.hyperledger.besu.internal:metrics-core:22.10.3'
 
-    dependencySet(group: 'tech.pegasys.teku.internal', version: '23.3.1') {
+    dependencySet(group: 'tech.pegasys.teku.internal', version: '23.6.0') {
       entry 'bls'
       entry 'spec'
       entry 'serializer'