Use designated initializers for ChainstateManager::Options

This wasn't available at the time when ChainstateManager::Options was
introduced but is helpful to be explicit and ensure correctness.

src/test/util/setup_common.cpp

@@ -183,8 +183,8 @@ ChainTestingSetup::ChainTestingSetup(const std::string& chainName, const std::ve
     m_cache_sizes = CalculateCacheSizes(m_args);
 
     const ChainstateManager::Options chainman_opts{
-        chainparams,
-        GetAdjustedTime,
+        .chainparams = chainparams,
+        .adjusted_time_callback = GetAdjustedTime,
     };
     m_node.chainman = std::make_unique<ChainstateManager>(chainman_opts);
     m_node.chainman->m_blockman.m_block_tree_db = std::make_unique<CBlockTreeDB>(m_cache_sizes.block_tree_db, true);