feat(workflow): attach HTML changelog to releases

Generate an HTML changelog alongside the existing forum format and
attach it as a release asset. This gives the marketing team a
ready-to-use HTML file for each release without manual generation.

Signed-off-by: John Molakvoæ (skjnldsv) <skjnldsv@protonmail.com>

Author: skjnldsv

.github/workflows/generate-release-changelog.yml

@@ -86,19 +86,39 @@ jobs:
         run: |
           echo '{"username": "github-actions"}' > github_helper/credentials.json
 
+      - name: Install github_helper dependencies
+        run: |
+          cd github_helper/changelog
+          composer install
+
       # Since this action only runs on nextcloud-releases, ignoring is okay
-      - name: Generate changelog between ${{ env.PREVIOUS_TAG }} and ${{ github.ref_name }} # zizmor: ignore[template-injection]
+      - name: Generate forum changelog between ${{ env.PREVIOUS_TAG }} and ${{ github.ref_name }} # zizmor: ignore[template-injection]
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           cd github_helper/changelog
-          composer install
           php index.php generate:changelog --no-bots --format=forum server ${{ env.PREVIOUS_TAG }} ${{ github.ref_name }} > changelog.md
 
+      # Since this action only runs on nextcloud-releases, ignoring is okay
+      - name: Generate HTML changelog between ${{ env.PREVIOUS_TAG }} and ${{ github.ref_name }} # zizmor: ignore[template-injection]
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          cd github_helper/changelog
+          php index.php generate:changelog --no-bots --format=html server ${{ env.PREVIOUS_TAG }} ${{ github.ref_name }} > "${{ github.ref_name }}.html"
+
       # Since this action only runs on nextcloud-releases, ignoring is okay
       - name: Set changelog to release # zizmor: ignore[template-injection]
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
          cd server
          gh release edit ${{ github.ref_name }} --notes-file "../github_helper/changelog/changelog.md" --title "${{ github.ref_name }}"
+
+      # Since this action only runs on nextcloud-releases, ignoring is okay
+      - name: Attach HTML changelog to release # zizmor: ignore[template-injection]
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+         cd server
+         gh release upload ${{ github.ref_name }} "../github_helper/changelog/${{ github.ref_name }}.html" --clobber