Remove release notes input and streamline changelog generation in build workflow

.gitea/workflows/build.yml

@@ -1,10 +1,6 @@
 on:
   workflow_dispatch:
     inputs:
-      release_notes:
-        description: Release notes (use \n for newlines)
-        type: string
-        required: false
       github_release:
         description: 'Create Gitea Release'
         default: true
@@ -48,13 +44,15 @@ jobs:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         branch: ${{ github.ref }}
     
-    - name: Create release notes
-      run: |
-        mkdir release_notes
-        echo -e "${{ inputs.release_notes }}" >> release_notes/release_notes.md
-        echo "Release notes:"
-        cat release_notes/release_notes.md
-        echo ""
+    - name: Build Changelog
+      id: build_changelog
+      uses: https://github.com/mikepenz/release-changelog-builder-action@v5
+      with:
+        platform: "gitea"
+        baseURL: "http://gitea:3000"
+        configuration: ".gitea/changelog-config.json"
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITEA_TOKEN }}
     - name: Build package
       run: uv build
     - name: Publish package
@@ -70,7 +68,7 @@ jobs:
       with:
         tag_name: ${{ env.VERSION }}
         release_name: Release ${{ env.VERSION }}
-        body_path: release_notes/release_notes.md
+        body: ${{steps.build_changelog.outputs.changelog}}
         draft: false
         prerelease: false
         make_latest: true