experimental tweak to github action

Author: soolar

.github/workflows/main.yml

@@ -45,10 +45,24 @@ jobs:
           mkdir -p dist
           cp -R KoLmafia/* dist/
           cp -R build/* dist/
+      - name: Create Changelog
+        id: changelog
+        uses: actions/github-script@v6.3.1
+        env:
+          COMMITS: ${{ toJSON(github.event.commits) }}
+        with:
+          result-encoding: string
+          script: |
+            const commits = JSON.parse(process.env.COMMITS);
+            var lines = "## What’s Changed\n\n";
+            for (const commit of commits) {
+              lines += "- " + commit.message + " (" + commit.id + ") @" + commit.author.username + "\n"
+            }
+            return lines
       - uses: s0/git-publish-subdir-action@develop
         env:
           REPO: self
           BRANCH: release
           FOLDER: dist
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          MESSAGE: 'Release for commit ${{ github.sha }}: ${{ github.event.commits[0].message }}'
+          MESSAGE: '${{ steps.changelog.outputs.result }}'