bump CGovernanceManager::SERIALIZATION_VERSION_STRING

Author: UdjinM6

src/governance/governance.cpp

@@ -24,7 +24,7 @@ CGovernanceManager governance;
 
 int nSubmittedFinalBudget;
 
-const std::string CGovernanceManager::SERIALIZATION_VERSION_STRING = "CGovernanceManager-Version-14";
+const std::string CGovernanceManager::SERIALIZATION_VERSION_STRING = "CGovernanceManager-Version-15";
 const int CGovernanceManager::MAX_TIME_FUTURE_DEVIATION = 60 * 60;
 const int CGovernanceManager::RELIABLE_PROPAGATION_TIME = 60;