Add @chitrangpatel as an pipelines maintainer

Chitrang has been a regular contributor to pipelines contributing many features such as sidecar logs, propagated params and workspaces, as well as the ongoing work around step reusability!

Reviews: https://github.com/tektoncd/pipeline/pulls?q=is%3Apr++reviewed-by%3Achitrangpatel+-author%3Achitrangpatel

OWNERS_ALIASES

@@ -11,6 +11,7 @@ aliases:
  - abayer
  - wlynch
  - yongxuanzhang
+ - chitrangpatel
 
  apis-approvers:
  - afrittoli