Fix: remove MEDIUM from scanning

Author: dv-hossam-radwan

.github/workflows/build-docker-artifacts.yml

@@ -249,7 +249,7 @@ jobs:
           exit-code: '1'
           ignore-unfixed: false
           vuln-type: 'os,library'
-          severity: 'MEDIUM,HIGH,CRITICAL'
+          severity: 'HIGH,CRITICAL'
         continue-on-error: false 
 
       - name: Push image