Bump azure/azapi from 1.12.1 to 1.13.1 in /code/infra

Bumps [azure/azapi](https://github.com/Azure/terraform-provider-azapi) from 1.12.1 to 1.13.1.
- [Release notes](https://github.com/Azure/terraform-provider-azapi/releases)
- [Changelog](https://github.com/Azure/terraform-provider-azapi/blob/main/CHANGELOG.md)
- [Commits](Azure/terraform-provider-azapi@v1.12.1...v1.13.1)

---
updated-dependencies:
- dependency-name: azure/azapi
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

code/infra/terraform.tf

@@ -8,7 +8,7 @@ terraform {
     }
     azapi = {
       source  = "azure/azapi"
-      version = "1.12.1"
+      version = "1.13.1"
     }
   }