Update Dockerfile.rhoai

Author: MohammadiIram

build/images/training-operator/Dockerfile.rhoai

@@ -37,7 +37,7 @@ RUN CGO_ENABLED=1 GOOS=linux GO111MODULE=on go build -tags strictfipsruntime -a
 # Runtime
 FROM registry.access.redhat.com/ubi9/ubi:latest
 
-RUN dnf update && dnf install -y bind-utils
+RUN dnf install -y bind-utils
 
 WORKDIR /
 COPY --from=builder /workspace/manager .