Add note about create-bisect-config

Author: msimacek

bisect-benchmark.ini

@@ -2,7 +2,9 @@
 # This is the configuration file for bisecting benchmark jobs in the CI.
 # Usage:
 # - Create a temporary branch based on the main branch (or the bad commit)
-# - Fill in this configuration file, commit the changes and push it
+# - Fill in this configuration file, preferably using the automated script
+#   graalpython-apptests/scripts/create-bisect-config
+# - Commit and push the file
 # - The push command output should give you a link to create a PR. Open it, but
 #   don't create a PR. Instead, you should execute the job on your commit using
 #   "Actions->Shcedule CI jobs" in the commit list. You may need to wait a bit