Fix multi-line command

Author: gerrod3

images/pulp/stable/Containerfile

@@ -43,8 +43,8 @@ RUN ln $(pip3 show pulp_container | sed -n -e 's/Location: //p')/pulp_container/
 RUN ln $(pip3 show pulp_python | sed -n -e 's/Location: //p')/pulp_python/app/webserver_snippets/nginx.conf /etc/nginx/pulp/pulp_python.conf
 
 RUN <<EOF
-if [[ "$PULP_UI_URL" ]]; then
+  if [[ "$PULP_UI_URL" ]]; then
     mkdir -p "${PULP_STATIC_ROOT}pulp_ui"
     curl -Ls $PULP_UI_URL | tar -xzv -C "${PULP_STATIC_ROOT}pulp_ui"
-fi
+  fi
 EOF