add compatibility_date to cloudflare_workers_script

[SASNOVACAT08]

Hello, thank you for this repo.

Currently, I deploy a worker without compatibility_date and FormData doesn't support File. I need to publish again with wrangler to have the compatibility_date.

I have added the attribute compatibility_date.

Closes #1869

[github-actions]

changelog detected ✅

[jacobbednarz]

acceptance tests all lookig good! thanks @SASNOVACAT08 👏

$ TEST="./internal/sdkv2provider" TESTARGS='-run "^TestAccCloudflareWorkerScript_"' make testacc
TF_ACC=1 go test ./internal/sdkv2provider -v -run "^TestAccCloudflareWorkerScript_" -timeout 120m -parallel 1
=== RUN   TestAccCloudflareWorkerScript_Import
--- PASS: TestAccCloudflareWorkerScript_Import (20.31s)
=== RUN   TestAccCloudflareWorkerScript_MultiScriptEnt
=== PAUSE TestAccCloudflareWorkerScript_MultiScriptEnt
=== RUN   TestAccCloudflareWorkerScript_ModuleUpload
=== PAUSE TestAccCloudflareWorkerScript_ModuleUpload
=== CONT  TestAccCloudflareWorkerScript_MultiScriptEnt
--- PASS: TestAccCloudflareWorkerScript_MultiScriptEnt (47.49s)
=== CONT  TestAccCloudflareWorkerScript_ModuleUpload
--- PASS: TestAccCloudflareWorkerScript_ModuleUpload (14.22s)
PASS
ok  	github.com/cloudflare/terraform-provider-cloudflare/internal/sdkv2provider	82.896s

[github-actions]

This functionality has been released in v4.2.0 of the Terraform Cloudflare Provider.

Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!