Use a raw block for template with jinja-like content

GitHub actions use the syntax `${{ ... }}` to inject variables, and
jinja, the template system behind cookicutter, use `{{ ... }}` so the
GitHub syntax is interpretes as jinja variable, resulting in an error.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

cookiecutter/{{cookiecutter.github_repo_name}}/.github/workflows/labeler.yml

@@ -1,3 +1,4 @@
+{% raw -%}
 name: Pull Request Labeler
 
 on: [pull_request_target]
@@ -21,3 +22,4 @@ jobs:
         uses: actions/labeler@0776a679364a9a16110aac8d0f40f5e11009e327  # 4.0.4
         with:
           repo-token: "${{ secrets.GITHUB_TOKEN }}"
+{%- endraw %}