[platform][arista] Fix NVMe sensor chip address in sensors.conf for 7060X6-64PE-B (sonic-net#22639)

Why I did it
The sensors.conf file was referencing a non-existent NVMe PCI address (nvme-pci-0500) on the Arista-7060X6-64PE-B platform. This mismatch caused pmon#sensord to report repeated I/O errors while attempting to read sensor data for a non-existent device (nvme/#7). Updating the config to use the correct PCI address (nvme-pci-0400) resolves the issue.

Work item tracking
Microsoft ADO (number only): 32849896
How I did it
Modified sensors.conf to change the chip identifier from nvme-pci-0500 to nvme-pci-0400 to match the actual hardware PCI bus location.

How to verify it
Verified that the /dev/nvme* devices are present and functional
Confirmed correct PCI ID using lspci
$ show plat sum
Platform: x86_64-arista_7060x6_64pe_b
HwSKU: Arista-7060X6-64PE-B-C512S2
ASIC: broadcom
ASIC Count: 1
Serial Number: XXXXXXXX
Model Number: DCS-7060X6-64PE-B
Hardware Revision: 02.00
$ lspci -nn | grep -i nvme
04:00.0 Non-Volatile memory controller [0108]: Phison Electronics Corporation E18 PCIe4 NVMe Controller [1987:5018] (rev 01)
Edited sensors.conf and restarted pmon (systemctl restart pmon)
Monitored logs to ensure pmon#sensord no longer reports I/O errors for nvme/#7

Author: vvolam

device/arista/x86_64-arista_7060x6_64pe_b/sensors.conf

@@ -8,7 +8,7 @@ chip "max6581-i2c-27-4d"
     ignore temp7
     ignore temp8
 
-chip "nvme-pci-0500"
+chip "nvme-pci-0400"
     # TODO: sensors complaining about tempX_min and tempX_max
     ignore temp2
     ignore temp3