chore: exclude .copier-answers.yml from newline validation

This validation was part the editorconfig check and causes failures on
the file copier regenerates.

This excludes that file from validation, as it generated and consumed
by the copier tool.

editorconfig-check.yml

@@ -14,7 +14,7 @@ editorconfig_check:
     entrypoint: []
   needs: []
   script:
-    - ec
+    - ec --exclude .copier-answers.yml
   after_script: |
     cat <<-EOD
     ----------------------------------------------------------