Adjust bootstrap request timeout

nano/node/bootstrap/bootstrap_config.hpp

@@ -53,7 +53,7 @@ class bootstrap_config final
 	std::size_t frontier_rate_limit{ 8 };
 	std::size_t database_warmup_ratio{ 10 };
 	std::size_t max_pull_count{ nano::bootstrap_server::max_blocks };
-	std::chrono::milliseconds request_timeout{ 1000 * 5 };
+	std::chrono::milliseconds request_timeout{ 1000 * 15 };
 	std::size_t throttle_coefficient{ 8 * 1024 };
 	std::chrono::milliseconds throttle_wait{ 100 };
 	std::size_t block_processor_threshold{ 1000 };