fix path name in lib file

guided_mrmp/utils/library.py

@@ -51,7 +51,7 @@ class Library:
 
 if __name__ == "__main__":
     # test reading in a library
-    lib = Library("2x3_library")
+    lib = Library("guided_mrmp/database/2x3_library")
     lib.read_library_from_file()
 
     print(lib.get_size())