Bump hashicorp/azurerm from 3.100.0 to 4.3.0

Bumps [hashicorp/azurerm](https://github.com/hashicorp/terraform-provider-azurerm) from 3.100.0 to 4.3.0.
- [Release notes](https://github.com/hashicorp/terraform-provider-azurerm/releases)
- [Changelog](https://github.com/hashicorp/terraform-provider-azurerm/blob/main/CHANGELOG-v3.md)
- [Commits](hashicorp/terraform-provider-azurerm@v3.100.0...v4.3.0)

---
updated-dependencies:
- dependency-name: hashicorp/azurerm
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

backend.tf

@@ -2,7 +2,7 @@ terraform {
   required_providers {
     azurerm = {
       source  = "hashicorp/azurerm"
-      version = "3.100.0"
+      version = "4.3.0"
     }
   }
   required_version = ">= 1.6.3"