repopick: Use `number` instead of `id` for error msgs

Change-Id: I1ebfd8315d1dbbdbee2cd50095f5d7c6b98e7057
diff --git a/build/tools/repopick.py b/build/tools/repopick.py
index 426e68c..7c83bc2 100755
--- a/build/tools/repopick.py
+++ b/build/tools/repopick.py
@@ -504,14 +504,14 @@
         elif args.ignore_missing:
             print(
                 "WARNING: Skipping {0} since there is no project directory for: {1}\n".format(
-                    review["id"], review["project"]
+                    review["number"], review["project"]
                 )
             )
             continue
         else:
             sys.stderr.write(
                 "ERROR: For {0}, could not determine the project path for project {1}\n".format(
-                    review["id"], review["project"]
+                    review["number"], review["project"]
                 )
             )
             sys.exit(1)