Trying to fix CI...

src/CMakeLists.txt

@@ -63,7 +63,7 @@ if ("${BUILD_LIB}" STREQUAL "yes")
             NormalizationStrategy/NormalizationStrategy.cpp
             LearningMethods/GradientDescentSingleItem.cpp
             LearningMethods/LearningSequence.cpp
-            LearningMethods/GradientDescentBB.cpp6
+            LearningMethods/GradientDescentBB.cpp
     )
 
     # FileSystem C++ library - has to be linked manually in GCC-8