Change contactState values to lowercase

[KrishnaIyer]

Summary

Change contactState values to lowercase

Changes

• Change contactState values to lowercase.

Checklist for Reviewers

• Title and description should be descriptive (Not just a serial number for example).
• profileIDs should not be vendorID and should be a unique value for every profile.
• All devices should be listed in the vendor's index.yaml file.
• Firmware versions can not be changed.
• At least 1 image per device and should be transparent.

Notes for Reviewers

Refs: https://github.com/TheThingsIndustries/lorawan-stack/pull/4450

Release Notes

• Changed the allowed values for action.contactState of normalized payloads to lowercase.

[KrishnaIyer]

https://github.com/TheThingsNetwork/lorawan-devices/actions/runs/11909901665/job/33188228146?pr=848#step:6:3191
So we should then update the normalizer here for the specific device right?

[johanstokking]

https://github.com/TheThingsNetwork/lorawan-devices/actions/runs/11909901665/job/33188228146?pr=848#step:6:3191 So we should then update the normalizer here for the specific device right?

Yes, make validate needs to pass.