ci: add release-please label (#57)

Co-authored-by: Averi Kitsch <akitsch@google.com>

Author: twishabansal

.github/labels.yaml

@@ -79,4 +79,8 @@
 
 - name: 'status: waiting for response'
   color: 8befd7
-  description: 'Status: reviewer is awaiting feedback or responses from the author before proceeding.'
+  description: 'Status: reviewer is awaiting feedback or responses from the author before proceeding.'
+
+- name: 'release-please:force-run'
+  color: bdca82
+  description: Manually trigger the release please workflow on a PR.