fix og image base url error

Author: madawei2699

themes/hugo-coder/layouts/_default/baseof.html

@@ -36,7 +36,7 @@
   {{ if .Params.og_image }}
   <meta property="og:image" content="{{ .Params.og_image }}" />
   {{ else }}
-  <meta name="twitter:image" content="{{ .Site.BaseURL }}{{ .Site.Params.og_image }}">
+  <meta name="og:image" content="{{ .Site.BaseURL }}{{ .Site.Params.og_image }}">
   {{ end }}
 
   {{ partial "schema.html" . }}