chore(release): add rsync to release workflow dependencies

.gitea/workflows/release.yaml

@@ -114,7 +114,7 @@ jobs:
           $SUDO apt-get update
           # sshpass from apt, fdroidserver via pip to get a newer androguard that
           # can parse modern Flutter/AGP APKs (apt ships fdroidserver 2.2.1 which crashes)
-          $SUDO apt-get install -y sshpass python3-pip
+          $SUDO apt-get install -y sshpass rsync python3-pip
           pip3 install --break-system-packages --upgrade fdroidserver
 
       - name: Initialize or fetch F-Droid Repository