chore(release): prepare for 1.138.4

.github/workflows/deltachat-rpc-server.yml

@@ -282,7 +282,7 @@ jobs:
           show-progress: false
       - uses: actions/setup-python@v5
         with:
-          python-version: '3.11' 
+          python-version: "3.11"
 
       - name: Download Linux aarch64 binary
         uses: actions/download-artifact@v4
@@ -373,7 +373,7 @@ jobs:
           for platform in ./platform_package/*; do npm pack "$platform"; done
           npm pack    
           ls -lah
-      
+
       - name: Upload to artifacts
         uses: actions/upload-artifact@v4
         with: