Update index.md

Author: KyleAMathews

docs/blog/2019-04-25-plugin-authoring-study/index.md

@@ -49,6 +49,7 @@ ANSWER: make time-consuming things take less time, and make frustrating things l
 
 People who use plugin authoring docs say they are super helpful; however, most people don’t know about them and solve challenges through looking at the source code of other plugins. While this works for many people, we think making this even easier is a positive change.
 
+<!--lint disable no-duplicate-headings-->
 ## Solution
 
 - [Gatsby CLI to add scaffolding for source plugin creation #13376](https://github.com/gatsbyjs/gatsby/issues/13376)
@@ -66,6 +67,7 @@ Examples of things that are confusing:
 - Most people don’t know how to write automated tests for plugins and mentioned building a site just to test the plugin, which they felt wasn't the most ideal way to test
 - Rebuilding for every change often “feels wrong” to people
 
+<!--lint disable no-duplicate-headings-->
 ## Solution
 
 [Redesigned the plugin docs](https://github.com/gatsbyjs/gatsby/pull/13261/files) to include a category called "Creating Plugins" where we can document answers to people's concerns; for example, ideas for how to test plugins and advice to use yarn workspaces to avoid yarn link inconsistencies.