[core] Switch to ankerl::unordered_dense

Signed-off-by: x7z4w <x7z4w@noreply.codeberg.org>

tools/openlr/openlr_decoder.hpp

@@ -9,9 +9,10 @@
 #include <cstdint>
 #include <functional>
 #include <string>
-#include <unordered_set>
 #include <vector>
 
+#include "3party/ankerl/unordered_dense.h"
+
 namespace openlr
 {
 struct LinearSegment;
@@ -35,7 +36,7 @@ public:
     bool Matches(LinearSegment const & segment) const;
 
   private:
-    std::unordered_set<uint32_t> m_ids;
+    ankerl::unordered_dense::set<uint32_t> m_ids;
     bool m_idsSet;
     bool const m_multipointsOnly;
   };