Bump hashicorp/null from 3.2.2 to 3.2.3 in /code/infra

Bumps [hashicorp/null](https://github.com/hashicorp/terraform-provider-null) from 3.2.2 to 3.2.3.
- [Release notes](https://github.com/hashicorp/terraform-provider-null/releases)
- [Changelog](https://github.com/hashicorp/terraform-provider-null/blob/main/CHANGELOG.md)
- [Commits](hashicorp/terraform-provider-null@v3.2.2...v3.2.3)

---
updated-dependencies:
- dependency-name: hashicorp/null
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

code/infra/terraform.tf

@@ -12,7 +12,7 @@ terraform {
     }
     null = {
       source  = "hashicorp/null"
-      version = "3.2.2"
+      version = "3.2.3"
     }
   }