Fix continuous-integration.yml concurrency control

Set cancel-in-progress to true so new builds skip when one is already
running, rather than queuing. This is more efficient since cron triggers
occur every few hours anyway.

Signed-off-by: Mark Pollack <[email protected]>

Author: markpollack

.github/workflows/continuous-integration.yml

@@ -31,7 +31,7 @@ jobs:
     if: ${{ github.repository_owner == 'spring-projects' }}
     concurrency:
       group: continuous-integration-${{ github.ref }}
-      cancel-in-progress: false  # Don't cancel running builds - let them complete
+      cancel-in-progress: true  # Skip if another build is running - next cron will trigger soon
     services:
       ollama:
         image: ollama/ollama:latest