Update gitignore to exclude package-lock.json

Author: Copilot

.gitignore

@@ -16,3 +16,4 @@ src/test/container-features/configs/temp_lifecycle-hooks-alternative-order
 test-secrets-temp.json
 src/test/container-*/**/src/**/README.md
 !src/test/container-features/assets/*.tgz
+package-lock.json