Rename `flutter packages` to `flutter pub` (#33041)

diff --git a/dev/bots/analyze-sample-code.dart b/dev/bots/analyze-sample-code.dart
index 23a9758..6304d49 100644
--- a/dev/bots/analyze-sample-code.dart
+++ b/dev/bots/analyze-sample-code.dart
@@ -565,7 +565,7 @@
     if (stdout.isNotEmpty && stdout.first == 'Building flutter tool...') {
       stdout.removeAt(0);
     }
-    if (stdout.isNotEmpty && stdout.first.startsWith('Running "flutter packages get" in ')) {
+    if (stdout.isNotEmpty && stdout.first.startsWith('Running "flutter pub get" in ')) {
       stdout.removeAt(0);
     }
     _exitCode = result.exitCode;