deploy(plutus-certification-web): increase docker version to 8

Author: bogdan-manole

deploy/dapps-certification-web.yaml

@@ -8,7 +8,7 @@ spec:
     - name: dapps-certification-web
       type: webservice
       properties:
-        image: ghcr.io/demoiog/plutus-certification-web:7
+        image: ghcr.io/demoiog/plutus-certification-web:8
         imagePullPolicy: IfNotPresent
         ports:
           - expose: true