Fix template strings to use {[ and }]

Author: lfrancke

template/docker/Dockerfile.j2

@@ -13,7 +13,7 @@ ARG RELEASE="1"
 ARG STACKABLE_USER_GID="574654813"
 ARG STACKABLE_USER_UID="782252253"
 
-# These labels have mostly been superseded by the OpenContainer spec annotations below but it doesn't hurt to include them
+# These labels have mostly been superceded by the OpenContainer spec annotations below but it doesn't hurt to include them
 # http://label-schema.org/rc1/
 LABEL name="Stackable Operator for {[ operator.pretty_string }]"
 LABEL maintainer="[email protected]"
@@ -42,15 +42,15 @@ LABEL org.opencontainers.image.authors="[email protected]"
 LABEL org.opencontainers.image.url="https://stackable.tech"
 LABEL org.opencontainers.image.vendor="Stackable GmbH"
 LABEL org.opencontainers.image.licenses="OSL-3.0"
-LABEL org.opencontainers.image.documentation="https://docs.stackable.tech/home/stable/{{ operator.product_string }}/"
+LABEL org.opencontainers.image.documentation="https://docs.stackable.tech/home/stable/{[ operator.product_string }]/"
 LABEL org.opencontainers.image.version="${VERSION}"
 LABEL org.opencontainers.image.revision="${RELEASE}"
 LABEL org.opencontainers.image.title="Stackable Operator for {[ operator.pretty_string }]"
 LABEL org.opencontainers.image.description="Deploy and manage {[ operator.pretty_string }] clusters."
 
 # https://docs.openshift.com/container-platform/4.16/openshift_images/create-images.html#defining-image-metadata
 # https://github.com/projectatomic/ContainerApplicationGenericLabels/blob/master/vendor/redhat/labels.md
-LABEL io.openshift.tags="ubi9,stackable,sdp,{{ operator.product_string }}"
+LABEL io.openshift.tags="ubi9,stackable,sdp,{[ operator.product_string }]"
 LABEL io.k8s.description="Deploy and manage {[ operator.pretty_string }] clusters."
 LABEL io.k8s.display-name="Stackable Operator for {[ operator.pretty_string }]"