chore: Fix the pre-commit configuration

Author: siegfriedweber

.pre-commit-config.yaml

@@ -1,5 +1,8 @@
 ---
-exclude: ^(Cargo\.nix|crate-hashes\.json|nix/.*)$
+# The files tests/templates/kuttl/smoke/31_configmap_.* define the expected ConfigMap contents.
+# New lines at the end of these files are intentional and must not be removed by the pre-commit hook
+# "end-of-file-fixer".
+exclude: ^(Cargo\.nix|crate-hashes\.json|nix/.*|tests/templates/kuttl/smoke/31_configmap_.*)$
 
 default_language_version:
   node: system