Additional silkscreen markings to assist with properly placing CNY70

I wanted to submit additional visual hints to assist with placement of the component on the PCB.

The component is fully symmetric (for the 180 degree rotation) and "fairly symmetric" for the 90 degree rotation.

This is the only way to properly determine the rotation:

but it also needs to be combined with the footprint to check which pin is which (the pins are not marked in the datasheet), so that one determins that the text needs to be next to pins 3 and 4 (and even then it's a bit of a hassle to find the proper rotation).

By far the easiest marking to assist with assembly is to mark the location where the text is written on the component.

Here is what EasyEDA uses:

but while the additional markings for round sensor openings are nice, they should not overlap copper area.

This is what I changed.

Before:

After: