[syncthing] Fix so it works with bsd sed

ansible/roles/syncthing/tasks/main.yml

@@ -36,6 +36,6 @@
 
 - name: Syncthing disable fsWatcher
   shell:
-    cmd: 'sed -i -e ''/^    <folder/s/fsWatcherEnabled="true"/fsWatcherEnabled="false'' /usr/local/etc/syncthing/config.xml'
+    cmd: 'sed -i -e ''s/fsWatcherEnabled="true"/fsWatcherEnabled="false/'' /usr/local/etc/syncthing/config.xml'
     warn: false
   notify: Syncthing restarted