ci(pipeline): add step to change directory in GitHub Actions workflow

- Added a step in the pipeline.yaml file to change the current working directory to 'helm-charts' before configuring git user details and adding changes.

.github/workflows/pipeline.yaml

@@ -135,6 +135,8 @@ jobs:
           mkdir -p helm-charts/repository/reflector
           cp .artifacts/helm/reflector-${{env.version}}.tgz  helm-charts/repository/reflector
 
+          cd helm-charts
+
           git config user.name "Romeo Dumitrescu"
           git config user.email "5931333+winromulus@users.noreply.github.com"
           git add .