deps: Bump terraform version to 1.13.5

[elastic-observability-automation]

deps: Bump terraform version

deps(terraform): Bump terraform version to 1.13.5

1 file(s) updated with "1.13.5\n": * tests/terraform/version/.terraform-version

v1.13.5

## 1.13.5 (November 5, 2025)


BUG FIXES:

* impure functions could cause templatefile to incorrectly fail consistency checks ([#37807](https://github.com/hashicorp/terraform/issues/37807))

* Allow filesystem functions to return inconsistent results when evaluated within provider configuration ([#37854](https://github.com/hashicorp/terraform/issues/37854))

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