Add provenance header to summary for nicer readability (#131)

* Add header to contents to separate it from provenance

* Temporarily print always to see markup

* It looks nice, let's leave it on always

* Add changelog

* Kill stray empty line

CHANGELOG.md

@@ -7,6 +7,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 
 ## [Unreleased](https://github.com/hynek/build-and-inspect-python-package/compare/v2.6.0...main)
 
+### Added
+
+- A header before package contents in the summary.
+  Especially useful together with a preceding build provenance attestation.
+  [#131](https://github.com/hynek/build-and-inspect-python-package/pull/131)
+
 
 ## [2.6.0](https://github.com/hynek/build-and-inspect-python-package/compare/v2.5.0...v2.6.0) - 2024-05-26
 

action.yml

@@ -120,6 +120,10 @@ runs:
       with:
         subject-path: "/tmp/baipp/dist/*"
 
+    - name: Add contents header
+      shell: bash
+      run: echo -e '\n### Package Contents' >> $GITHUB_STEP_SUMMARY
+
     - name: Set output
       id: dist-location-setter
       shell: bash