[Upd] #define guard that were using system implementation convention

include/aidge/backend/OperatorImpl.hpp

@@ -9,8 +9,8 @@
  *
  ********************************************************************************/
 
-#ifndef __AIDGE_OPERATORIMPL_H__
-#define __AIDGE_OPERATORIMPL_H__
+#ifndef AIDGE_OPERATORIMPL_H_
+#define AIDGE_OPERATORIMPL_H_
 
 #include <cstddef>
 #include <vector>
@@ -57,4 +57,4 @@ public:
 };
 } // namespace Aidge
 
-#endif /* __AIDGE_OPERATORIMPL_H__ */
+#endif /* AIDGE_OPERATORIMPL_H_ */