Fix delete REST endpoint

This was accidentally changed in Id48037c001.

Bug: Issue 10320
Change-Id: I910c3f7acc4c903d6b3347dc972113a61d9cd832
diff --git a/gr-delete-repo/gr-delete-repo.js b/gr-delete-repo/gr-delete-repo.js
index 10957af..0ce69c4 100644
--- a/gr-delete-repo/gr-delete-repo.js
+++ b/gr-delete-repo/gr-delete-repo.js
@@ -39,7 +39,7 @@
     },
 
     _handleDeleteRepo() {
-      const endpoint = '/repos/' +
+      const endpoint = '/projects/' +
           encodeURIComponent(this.repoName) + '/' +
           this.actionId;