add default to description in zero_trust_device_custom_profile

[jlu-cloudflare]

• I understand that this repository is auto-generated and my pull request may not be merged

Changes being requested

This adds the Default and Computed attribute to the description field of zero_trust_device_custom_profiles

Acceptance test run results

• I have added or updated acceptance tests for my changes
• I have run acceptance tests for my changes and included the results below

Steps to run acceptance tests

Test output

Additional context & links

[musa-cf]

Tests ran against our own test account:

╰─❯ TF_ACC=1 go test ./internal/services/zero_trust_device_custom_profile -run 'TestAcc' -count=1 -v
=== RUN   TestAccCloudflareZeroTrustDeviceCustomProfile_Basic
--- PASS: TestAccCloudflareZeroTrustDeviceCustomProfile_Basic (5.40s)
=== RUN   TestAccCloudflareZeroTrustDeviceCustomProfile_Complete
--- PASS: TestAccCloudflareZeroTrustDeviceCustomProfile_Complete (7.97s)
=== RUN   TestAccCloudflareZeroTrustDeviceCustomProfile_WithExclude
--- PASS: TestAccCloudflareZeroTrustDeviceCustomProfile_WithExclude (7.59s)
=== RUN   TestAccCloudflareZeroTrustDeviceCustomProfile_ServiceMode
--- PASS: TestAccCloudflareZeroTrustDeviceCustomProfile_ServiceMode (4.70s)
PASS
ok  	github.com/cloudflare/terraform-provider-cloudflare/internal/services/zero_trust_device_custom_profile	27.693s