fix typo in comment on CRAC version

Signed-off-by: Thomas Bouquet <thomas.bouquet@rte-france.com>

Author: bqth29

data/crac/crac-io/crac-io-json/src/main/java/com/powsybl/openrao/data/crac/io/json/JsonSerializationConstants.java

@@ -64,7 +64,7 @@ private JsonSerializationConstants() {
     v2.7: addition of timestamp
     v2.8: removal of range actions' initial set-point and FlowCNECs' iMax, optional ranges for PST range actions, deletion of usage methods
     v2.9: add acEmulationDeactivationAction
-    v2.9: renaming of danglingLineActions to boundaryLineActions
+    v2.10: renaming of danglingLineActions to boundaryLineActions
      */
 
     // headers