starters(slides): update modules

Fixes #2811

starters/markdown-slides/README.md

@@ -18,7 +18,7 @@ The integrated [**Wowchemy**](https://wowchemy.com) website builder and CMS make
 - ⬇️ **Automatically import citations from BibTeX** with the [Hugo Academic CLI](https://github.com/wowchemy/hugo-academic-cli)
 - 🐦 Share your new site with the community: [@wowchemy](https://twitter.com/wowchemy) [@GeorgeCushen](https://twitter.com/GeorgeCushen) [#MadeWithWowchemy](https://twitter.com/search?q=%23MadeWithWowchemy&src=typed_query)
 - 🗳 [Take the survey and help us improve #OpenSource](https://forms.gle/NioD9VhUg7PNmdCAA)
-- 🚀 [Contribute improvements](https://github.com/wowchemy/wowchemy-hugo-themes/blob/main/.github/contributing.md) or [suggest improvements](https://github.com/wowchemy/wowchemy-hugo-themes/issues)
+- 🚀 [Contribute improvements](https://github.com/wowchemy/wowchemy-hugo-themes/blob/main/CONTRIBUTING.md) or [suggest improvements](https://github.com/wowchemy/wowchemy-hugo-themes/issues)
 - ⬆️ **Updating?** View the [Update Guide](https://wowchemy.com/docs/hugo-tutorials/update/) and [Release Notes](https://github.com/wowchemy/wowchemy-hugo-themes/releases)
 
 ## We ask you, humbly, to support this open source movement

starters/markdown-slides/go.mod

@@ -5,5 +5,6 @@ go 1.15
 require (
 	github.com/wowchemy/wowchemy-hugo-themes/modules/wowchemy-plugin-netlify v1.0.0 // indirect
 	github.com/wowchemy/wowchemy-hugo-themes/modules/wowchemy-plugin-netlify-cms v1.0.0 // indirect
+	github.com/wowchemy/wowchemy-hugo-themes/modules/wowchemy-plugin-reveal v1.0.0 // indirect
 	github.com/wowchemy/wowchemy-hugo-themes/modules/wowchemy/v5 v5.6.0 // indirect
 )