added duckduckgo to web-search

plugins/web-search/web-search.plugin.zsh

@@ -53,4 +53,4 @@ alias news='web_search duckduckgo \!n'
 alias youtube='web_search duckduckgo \!yt'
 alias map='web_search duckduckgo \!m'
 alias image='web_search duckduckgo \!i'
-alias ducky='web_search duckduckgo \!'
+alias ducky='web_search duckduckgo \!'