pegasus_layout and zephyr_layout return out of range values

[mahdiehmalekian]

Description
dnx.pegasus_layout and dnx.zephyr_layout return out of range values

To Reproduce

p2 = dnx.pegasus_graph(2)
p2_layout = dnx.pegasus_layout(p2)
p2_layout_arr = np.array([p2_layout[v] for v in p2.nodes()])
x_min, y_min = np.round(np.min(p2_layout_arr, axis=0), 2)
x_max, y_max = np.round(np.max(p2_layout_arr, axis=0), 2)
print(f'x range: [{x_min}, {x_max}], y_range: [{y_min}, {y_max}]')

The output is x range: [0.09, 0.87], y_range: [-0.87, -0.09]

Similarly,

z2 = dnx.zephyr_graph(2)
z2_layout = dnx.zephyr_layout(z2)
z2_layout_arr = np.array([z2_layout[v] for v in z2.nodes()])
x_min, y_min = np.round(np.min(z2_layout_arr, axis=0), 2)
x_max, y_max = np.round(np.max(z2_layout_arr, axis=0), 2)
print(f'x range: [{x_min}, {x_max}], y_range: [{y_min}, {y_max}]')

The output is x range: [0.02, 4.84], y_range: [-4.84, -0.02]

Expected behavior
x values are expected to fall in [0, 1] and y values are expected to fall in [-1, 0]

Additional context
I have made a PR here to address this issue.