Adds schedule type event tag

Author: Blaize Kaye

.github/workflows/insights-trivy-image.yaml

@@ -88,6 +88,9 @@ jobs:
             type=ref,event=pr
             # pull request event
             type=ref,event=branch
+            #schedule event tags - gives us a tag per day
+            type=schedule,pattern={{date 'YYYYMMDD'}}
+            type=schedule,value=latest
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@29109295f81e9208d7d86ff1c6c12d2833863392 # v3.6.0