fix minimal Boost version for concurrent hashmap

Author: MClemot

core/base/delaunayRipsPersistenceDiagram/geoPHUtils.h

@@ -11,7 +11,7 @@
 #include <boost/unordered/unordered_set.hpp>
 #endif
 
-#if((BOOST_VERSION / 100) % 1000) >= 83
+#if((BOOST_VERSION / 100) % 1000) >= 84
 #include <boost/unordered/concurrent_flat_map.hpp>
 #define TTK_CONCURRENT_HASHTABLE_AVAILABLE
 #endif
@@ -59,7 +59,7 @@ namespace ttk::gph {
   using HashSet = boost::unordered_set<X>;
 #endif
 
-#if((BOOST_VERSION / 100) % 1000) >= 83
+#if((BOOST_VERSION / 100) % 1000) >= 84
   template <typename X, typename Y>
   using ConcurrentHashMap = boost::concurrent_flat_map<X, Y>;
 #endif