chore: always bundle latest draw.io version in Electron builds

Remove pinned v29.3.5 tag so the build always clones the latest draw.io.
This adds the Animated GIF export and other new features to the Electron app.

Closes #770

.github/workflows/electron-release.yml

@@ -37,7 +37,7 @@ jobs:
       - name: Download draw.io static files for offline use
         run: |
           rm -rf public/drawio
-          git clone --depth 1 --branch v29.3.5 https://github.com/jgraph/drawio.git /tmp/drawio
+          git clone --depth 1 https://github.com/jgraph/drawio.git /tmp/drawio
           mkdir -p public/drawio
           cp -r /tmp/drawio/src/main/webapp/* public/drawio/
           rm -rf public/drawio/WEB-INF
@@ -70,7 +70,7 @@ jobs:
         shell: bash
         run: |
           rm -rf public/drawio
-          git clone --depth 1 --branch v29.3.5 https://github.com/jgraph/drawio.git /tmp/drawio
+          git clone --depth 1 https://github.com/jgraph/drawio.git /tmp/drawio
           mkdir -p public/drawio
           cp -r /tmp/drawio/src/main/webapp/* public/drawio/
           rm -rf public/drawio/WEB-INF