Fixed typo in query editor placeholder text.

public/app/plugins/datasource/influxdb/partials/query.editor.html

@@ -2,7 +2,7 @@
 
 	<div ng-if="ctrl.target.rawQuery">
     <div class="gf-form">
-      <textarea rows="3" class="gf-form-input" ng-model="ctrl.target.query" spellcheck="false" placeholder="InfuxDB Query" ng-model-onblur ng-change="ctrl.refresh()"></textarea>
+      <textarea rows="3" class="gf-form-input" ng-model="ctrl.target.query" spellcheck="false" placeholder="InfluxDB Query" ng-model-onblur ng-change="ctrl.refresh()"></textarea>
     </div>
     <div class="gf-form-inline">
       <div class="gf-form">