Tests don't run for template updates

[pinin4fjords]

Have you checked the docs?

• [X] nf-core website: troubleshooting
• [X] nf-core modules documentation

Description of the bug

Changes to files in template folders don't trigger our CI tests. We might need to replace @adamrtalbot 's action magic with the newer nf-test change-finding magic.

Command used and terminal output

No response

Relevant files

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System information

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