fix: remove reference to old zealous-zebra project (#7303)

* fix: remove reference to old `zealous-zebra` project

* fix(build): use `edge` tag from our repositories

book/src/user/docker.md

@@ -30,4 +30,4 @@ See [Building Zebra](https://github.com/ZcashFoundation/zebra#building-zebra) fo
 
 The images built by the Zebra team are all publicly hosted. Old image versions meant to be used by our [CI pipeline](https://github.com/ZcashFoundation/zebra/blob/main/.github/workflows/continous-integration-docker.yml) (`zebrad-test`, `lighwalletd`) might be deleted on a scheduled basis.
 
-We use [Docker Hub](https://hub.docker.com/r/zfnd/zebra) for end-user images and [Google Artifact Registry](https://console.cloud.google.com/artifacts/docker/zealous-zebra/us/zebra) to build external tools and test images
+We use [Docker Hub](https://hub.docker.com/r/zfnd/zebra) for end-user images and [Google Artifact Registry](https://console.cloud.google.com/artifacts/docker/zfnd-dev-zebra/us/zebra) to build external tools and test images

docker/Dockerfile

@@ -93,8 +93,8 @@ ENV CARGO_HOME="/opt/zebrad/.cargo/"
 FROM deps AS tests
 # TODO: do not hardcode the user /root/ even though is a safe assumption
 # Pre-download Zcash Sprout, Sapling parameters and Lightwalletd binary
-COPY --from=us-docker.pkg.dev/zealous-zebra/zebra/zcash-params /root/.zcash-params /root/.zcash-params
-COPY --from=us-docker.pkg.dev/zealous-zebra/zebra/lightwalletd /opt/lightwalletd /usr/local/bin
+COPY --from=us-docker.pkg.dev/zfnd-dev-zebra/zebra/zcash-params:edge /root/.zcash-params /root/.zcash-params
+COPY --from=us-docker.pkg.dev/zfnd-dev-zebra/zebra/lightwalletd:edge /opt/lightwalletd /usr/local/bin
 
 # cargo uses timestamps for its cache, so they need to be in this order:
 # unmodified source files < previous build cache < modified source files
@@ -176,7 +176,7 @@ RUN chmod u+x /runtime-entrypoint.sh
 FROM debian:bullseye-slim AS runtime
 COPY --from=release /opt/zebrad/target/release/zebrad /usr/local/bin
 COPY --from=release /runtime-entrypoint.sh /
-COPY --from=us-docker.pkg.dev/zealous-zebra/zebra/zcash-params /root/.zcash-params /root/.zcash-params
+COPY --from=us-docker.pkg.dev/zfnd-dev-zebra/zebra/zcash-params:edge /root/.zcash-params /root/.zcash-params
 
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \