[CX-0136 - PCF Use Case] Update sequence diagrams related to R25.09 improvements

[lkschl]

Standard
CX-0136: Use Case PCF

Version
None

Release
R25.09: CX-Saturn

The sequence diagrams for PCF exchange need update following endpoint adjustments proposed in Change Request CX-0136 Use Case PCF, i.e. the CustomerPartId Improvement:
https://github.com/catenax-eV/cx-com-sustainability/issues/17

Involved Members
@lkschl @finnhonsberg