Fix version filtering

Author: srebhan

layouts/shortcodes/telegraf/plugins.html

@@ -7,7 +7,7 @@
 {{ range (index .Site.Data.telegraf_plugins $type ) }}
   {{ $pluginTags := delimit .tags " " }}
   {{ $osTags := delimit .os_support " " }}
-  {{ $minorVer := replaceRE `\.[^.]*$` "" .introduced }}
+  {{ $minorVer := replaceRE `v([0-9]+\.[0-9]+)\.[0-9]+$` "$1" .introduced }}
 
   <div class="plugin-card filter-item visible{{ if eq $minorVer $latestTelegrafVersion }} new{{ end }}" id="{{ .id }}" data-tags="{{ $type }} {{ lower $pluginTags }} {{ lower $osTags }} {{ if eq $minorVer $latestTelegrafVersion }}new{{ end }} {{ if .deprecated }}deprecated{{ end }} ">
     <div class="info">