fix: go template in go template syntax

[leonsteinhaeuser]

Description

Before the introduction of this fix, the rendered template looked like this appname-{{ (index .path.segments 1)-{{ index .path.segments 2 }} }}, which is not a valid syntax.

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• See examples folder "example-{{ (index .path.segments 1) }}-{{ index .path.segments 2 }}"

Test Configuration:

• Terraform version: v1.6.1
• Module version: dirty

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings