Workbench: Small fix.

workbench/Dockerfile

@@ -27,6 +27,7 @@ RUN apt-get update && \
         bash-completion \
         bats \
         bc \
+        bind9-dnsutils \
         build-essential \
         bundler \
         bzr \
@@ -42,7 +43,6 @@ RUN apt-get update && \
         devscripts \
         direnv \
         dirmngr \
-        dnsutils \
         docker-buildx-plugin \
         docker-cli \
         docker-compose-plugin \