Change 'analyze tests co19_2' to use '-asserts'.

Change-Id: I9ed20ff353fcbdc8042589e619b275e84d5dc7e0
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/96820
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>
diff --git a/tools/bots/test_matrix.json b/tools/bots/test_matrix.json
index 766eb75..e7b0ef4 100644
--- a/tools/bots/test_matrix.json
+++ b/tools/bots/test_matrix.json
@@ -1387,7 +1387,7 @@
         {
           "name": "analyze tests co19_2",
           "arguments": [
-            "-nanalyzer-${system}",
+            "-nanalyzer-asserts-${system}",
             "co19_2"
           ]
         }