condition on webhook body

.circleci/config.yml

diff --git a/.circleci/config.yml b/.circleci/config.yml
index 47fe1a8..2aa3267 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -1371,6 +1371,10 @@
 
   warm-cache:
     when:
-      equal: [ "custom_webhook", << pipeline.event.name >> ]
+      and:
+        - equal: [ "custom_webhook", << pipeline.event.name >> ]
+        - matches:
+            pattern: ".*warm-cache.*"
+            value: << pipeline.trigger_parameters.webhook.body >>
     jobs:
       - build-linux