Fix the version used in bump-canton for querying docker images

[static]

Signed-off-by: Moritz Kiefer <moritz.kiefer@purelyfunctional.org>

Author: cocreature

build-tools/bump-canton.sh

@@ -40,6 +40,6 @@ set_value oss_sha256 "$oss_nix256"
 
 for img in base participant mediator sequencer; do
   _info "Fetching image sha256 for canton-$img..."
-  sha=$(skopeo inspect "docker://europe-docker.pkg.dev/da-images/public-all/docker/canton-$img:${CANTON_VERSION}" --format '{{.Digest}}')
+  sha=$(skopeo inspect "docker://europe-docker.pkg.dev/da-images/public-all/docker/canton-$img:${NEW_VERSION}" --format '{{.Digest}}')
   set_value "canton_${img}_image_sha256" "$sha"
 done