Add temp tag shas to github job summary

.github/workflows/_buildpacks-release.yml

@@ -201,6 +201,8 @@ jobs:
             output_dir=$(jq --exit-status -r ".[$i].output_dir" <<< "${TARGETS}")
             echo "Packaging ${output_dir} into ${target_temp_tags[i]}"
             pack buildpack package "${target_temp_tags[i]}" --config "${output_dir}/package.toml" -v --publish
+            digest=$(crane digest "${target_temp_tags[i]}")
+            echo "- `${target_temp_tags[i]}`: `${digest}`" >> $GITHUB_STEP_SUMMARY
           done
 
           # If there is more than one target, publish a multi-platform
@@ -219,6 +221,8 @@ jobs:
 
             # Push the manifest list / image index to a temporary tag
             docker manifest push "${{ matrix.temporary_tag }}"
+            digest=$(crane digest "${{ matrix.temporary_tag }}")
+            echo "- `${{ matrix.temorary_tag }}`: `${digest}`" >> $GITHUB_STEP_SUMMARY
           fi
 
       - name: Promote temporary tags to stable tags

src/commands/generate_buildpack_matrix/command.rs

@@ -66,7 +66,7 @@ pub(crate) fn execute(args: &GenerateBuildpackMatrixArgs) -> Result<()> {
 
     actions::set_output("buildpacks", &buildpacks_json).map_err(Error::WriteActionData)?;
     actions::set_summary(format!(
-        "<details><summary><b>Buildpack Matrix</b></summary>\n```json\n{buildpacks_json}\n```\n</details>"
+        "<details><summary>Buildpack Matrix</summary>\n```json\n{buildpacks_json}\n```\n</details>"
     ))
     .map_err(Error::WriteActionData)?;