add dev push version update, manual version bump

.gitea/workflows/release.yml

@@ -145,7 +145,31 @@ jobs:
         uses: ad-m/github-push-action@master
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
-          branch: ${{ env.PUSH_BRANCH }}
+          branch: main
+      - name: Update `dev` branch with new version
+        run: |
+          # ensure we have the latest remote refs
+          git fetch origin dev || true
+
+          # switch to dev if it exists remotely, otherwise create it
+          if git rev-parse --verify origin/dev >/dev/null 2>&1; then
+            git checkout dev
+            git pull origin dev
+          else
+            git checkout -b dev
+          fi
+
+          # replace the version line inside pyproject.toml
+          sed -E -i "s/^(version\s*=\s*)\".*\"/\1\"${{ env.VERSION }}\"/" pyproject.toml || true
+
+          git add pyproject.toml || true
+          git commit -m "chore: bump pyproject version for dev -> v${{ env.VERSION }}" || echo "no changes to commit"
+
+      - name: Push dev changes
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branch: dev
       - name: Build Changelog
         id: build_changelog
         uses: https://github.com/mikepenz/release-changelog-builder-action@v5