Change default answer in release.yml to "no" for submodules

Since releases on 2.2 and prior are few and far between, it makes more
sense to set the default to "no" for 2.3+ now.

packaging/release/release.yml

@@ -33,7 +33,7 @@
   #  private: no
   - name: has_submodules
     prompt: "Does this branch have git submodules?"
-    default: "yes"
+    default: "no"
     private: no
   - name: is_final
     prompt: "Is this a final release (not a beta/rc)?"