Update experience-info.html (#502)

added .html to multiple-positions

layouts/partials/sections/experiences/experience-info.html

@@ -1,5 +1,5 @@
 {{ if gt (len .positions) 1 }}
-  {{ partial "sections/experiences/multiple-positions" . }}
+  {{ partial "sections/experiences/multiple-positions.html" . }}
 {{ else }}
   {{ partial "sections/experiences/single-position.html" . }}
 {{ end }}