fix thumbnail

Author: nicolaskruchten

r/2018-01-29-hover-text-and-formatting.Rmd

@@ -3,7 +3,7 @@ name: Hover Text and Formatting
 permalink: r/hover-text-and-formatting/
 description: How to use hover text and formatting in R with Plotly.
 layout: base
-thumbnail: thumbnail/hover'text.jpg
+thumbnail: thumbnail/hover-text.jpg
 language: r
 display_as: file_settings
 order: 7
@@ -154,4 +154,4 @@ p
 
 #### Reference
 
-See [https://plot.ly/r/reference/](https://plot.ly/r/reference/) for more information and options!
+See [https://plot.ly/r/reference/](https://plot.ly/r/reference/) for more information and options!