Updated exmples of physical slot formats in function description

U78CC.001.FZHAK92-P2-C3 which is exisitng format
U50EE.001.WZS0011-P3-C20-R1 which is new format

We are maitatining both the formats as both formats are required.
Both are returning expected output without any issues.

Signed-off-by: Maram Srimannarayana Murthy <msmurthy@linux.vnet.ibm.com>

Author: maramsmurthy

avocado/utils/pci.py

@@ -192,8 +192,8 @@ def get_slot_from_sysfs(full_pci_address):
 
     :return: Removed port related details using re, only returns till
              physical slot of the adapter
-             Examples: U78CD.001.FZHAK92-P2-C3
-                       U50EE.001.WZS0011-P3-C20-R1
+             Examples: U78CC.001.FZHAK92-P2-C3
+                       U50EE.001.WZS0011-P3-C20-R2
     """
     if not os.path.isfile(f"/sys/bus/pci/devices/{full_pci_address}/devspec"):
         return None