Update cache_java.yml

Disable scheduled execution until the workflow is fixed

Author: jbachorik

.github/workflows/cache_java.yml

@@ -1,9 +1,6 @@
 name: Cache Java Distributions
 
 on:
-  schedule:
-    # Runs every day at 03:00 UTC
-    - cron: '0 3 * * *'
   workflow_dispatch:
 
 env: