ci: PLT-690: Fix docker image tag

Author: nikitabelonogov

.github/workflows/release-pipeline.yml

@@ -62,7 +62,7 @@ jobs:
           DOCKER_BUILD_RECORD_UPLOAD: "false"
         with:
           context: "${{ env.DOCKER_EXAMPLES_DIRECTORY }}/${{ env.backend_dir_name }}"
-          tags: "${{ matrix.backend_tag_prefix }}${{ inputs.ref || github.ref_name }}"
+          tags: "heartexlabs/label-studio-ml-backend:${{ matrix.backend_tag_prefix }}${{ inputs.ref || github.ref_name }}"
           push: true
           cache-from: type=gha
           cache-to: type=gha,mode=max