EteSync: add the contacts (was already in calendar and tasks)

For some reason EteSync wasn't listed under contacts (I guess the
category was added after EteSync was already on the list).
EteSync is already under calendar and tasks, this commit adds
EteSync under contacts too.

yaml/degoogle.yml

@@ -968,6 +968,11 @@ mobile applications:
       fdroid: opencontacts.open.com.opencontacts
       text: |
         Open source contacts. (thanks u/consentio)
+    - name: EteSync
+      url: https://www.etesync.com
+      eyes: null
+      text: |
+        Secure, end-to-end encrypted, and open-source sync for your contacts, calendars and tasks.
   messages:
     - title: Android Messages (specifically SMS/MMS, not IM)
     - name: QKSMS