ci: fix a typo in payload size limit config (angular#37151)

This commit fixes a small typo in the payload size limit config introduced in angular@639fab2.

PR Close angular#37151

Author: AndrewKushnir

goldens/size-tracking/integration-payloads.json

@@ -4,7 +4,7 @@
       "uncompressed": {
         "runtime-es2015": 1485,
         "main-es2015": 142794,
-s        "polyfills-es2015": 36657
+        "polyfills-es2015": 36657
       }
     }
   },