fix: add missing file for release process

.github/workflows/workspace_snippet.sh

diff --git a/.github/workflows/workspace_snippet.sh b/.github/workflows/workspace_snippet.sh
new file mode 100755
index 0000000..441dc0d
--- /dev/null
+++ b/.github/workflows/workspace_snippet.sh
@@ -0,0 +1,24 @@
+#!/usr/bin/env bash
+
+set -o errexit -o nounset -o pipefail
+
+# Set by GH actions, see
+# https://docs.github.com/en/actions/learn-github-actions/environment-variables#default-environment-variables
+TAG=${GITHUB_REF_NAME}
+TAG_NO_PREFIX=${TAG:1}
+SHA=$(git archive --format=tar --prefix=bazel-lib-${TAG_NO_PREFIX}/ ${TAG} | gzip | shasum -a 256 | awk '{print $1}')
+
+cat << EOF
+
+WORKSPACE snippet:
+
+\`\`\`starlark
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
+http_archive(
+    name = "aspect_bazel_lib",
+    sha256 = "${SHA}",
+    url = "https://github.com/aspect-build/bazel-lib/archive/${TAG}.tar.gz",
+)
+\`\`\`
+EOF