firefly-iii: Enable Webhooks

At some point, Firefly III added an `ALLOW_WEBHOOKS` option.  It's set
to `false` by default, but it didn't seem to have any affect on
_running_ webhooks, only visiting the webhooks configuraiton page.  Now,
that seems to have changed, and the setting needs to be enabled in order
for the webhooks to run.

I'm not sure why `disableNameSuffixHash` was set on the ConfigMap
generator.  It shouldn't be, so that Kustomize can ensure the Pod is
restarted when the contents of the ConfigMap change.

firefly-iii/firefly-iii.env

@@ -32,3 +32,5 @@ MAIL_PORT=25
 MAIL_ENCRYPTION=null
 MAIL_FROM=firefly-iii@pyrocufflink.net
 SEND_ERROR_MESSAGE=false
+
+ALLOW_WEBHOOKS=true

firefly-iii/kustomization.yaml

@@ -22,8 +22,6 @@ configMapGenerator:
 - name: firefly-iii
   envs:
   - firefly-iii.env
-  options:
-    disableNameSuffixHash: true
 - name: firefly-iii-importer
   envs:
   - firefly-iii-importer.env