Minor fix in objects dimensions

[nataliakoliou]

We've refined the make_square and make_long functions to address a potential issue where generated shapes could exceed the specified max_dim limit along the x or y axis.

1. In the make_square function, we've adjusted the calculation of the upper limit (lim) for the random delta to ensure that the generated square stays within the specified max_dim along either the x or y axis.

2. Similarly in the make_long function, we've adjusted the calculation of lim_x2 and lim_y2 to prevent the generated long shape from exceeding the specified max_dim along either the x or y axis.

Closes #23

[stasinos]

Thank you for the fix @nataliakoliou
I have one question: If the ValueError is now not raised, why did you not remove the try in make_production_dataset() ?

[nataliakoliou]

Sorry for the oversight! Thank you @stasinos for pointing that out. I have removed the try-except block it in the updated code.