Fix disableComments with utterances

layouts/partials/posts/utterances.html

@@ -1,5 +1,5 @@
 {{- if isset .Site.Params "utterances" -}}
-  {{- if and (isset .Site.Params.utterances "repo") (not (eq .Site.Params.utterances.repo "" )) (eq (.Params.disable_comments | default false) false) -}}
+  {{- if and (isset .Site.Params.utterances "repo") (not (eq .Site.Params.utterances.repo "" )) (eq (.Params.disableComments | default false) false) -}}
   <script src="https://utteranc.es/client.js"
     repo= "{{ .Site.Params.utterances.repo }}"
     issue-term="{{ default "title" .Site.Params.utterances.issueTerm }}"