paperless-ngx: Work around PDF rendering errors

Occasionally, some documents may have odd rendering errors that
prevent the archival process from working correctly.  I'm less concerned
about the archive document than simply having a centralized storage for
paperwork, so enabling this "continue on soft render error" feature is
appropriate.  As far as I can tell, it has no visible effect for the
documents that could not be imported at all without it.

paperless-ngx/paperless-ngx.yaml

@@ -80,6 +80,8 @@ spec:
           value: '1'
         - name: PAPERLESS_ENABLE_FLOWER
           value: 'true'
+        - name: PAPERLESS_OCR_USER_ARGS
+          value: '{"continue_on_soft_render_error": true}'
         ports:
         - name: http
           containerPort: 8000