chore: format - Use Https over http in docs (#13709)

docs/contributing/gatsby-style-guide.md

@@ -415,7 +415,7 @@ For words that have multiple spellings, prefer the US English word over British
 
 ### Use apps that help you edit
 
-Use the [Hemingway App](http://www.hemingwayapp.com/). There’s nothing magical
+Use the [Hemingway App](https://www.hemingwayapp.com/). There’s nothing magical
 about this tool, but it will automatically detect widely agreed-upon
 style issues:
 

docs/contributing/how-to-file-an-issue.md

@@ -11,7 +11,7 @@ If you want your issue to be resolved quickly, please include in your issue:
   `gatsby-node.js`, `gatsby-browser.js` `gatsby-ssr.js` files depending on
   changes you've made there.
 
-Please do not use the issue tracker for personal support requests. [Stack Overflow](http://stackoverflow.com/questions/ask?tags=gatsby) (**gatsby** tag) and the [Gatsby Discord](https://gatsby.dev/discord) are better places to get help.
+Please do not use the issue tracker for personal support requests. [Stack Overflow](https://stackoverflow.com/questions/ask?tags=gatsby) (**gatsby** tag) and the [Gatsby Discord](https://gatsby.dev/discord) are better places to get help.
 
 ### Special Note on Issues
 

docs/contributing/rfc-process.md

@@ -57,7 +57,7 @@ RFC merged into the RFC repo as a markdown file. At that point the RFC is
 'active' and may be implemented with the goal of eventual inclusion into
 Gatsby.
 
-- Fork the RFC repo http://github.com/gatsbyjs/rfcs Copy `0000-template.md` to
+- Fork the RFC repo https://github.com/gatsbyjs/rfcs Copy `0000-template.md` to
 - `text/0000-my-feature.md` (where
   'my-feature' is descriptive. Don't assign an RFC number yet).
 - Fill in the RFC. Put care into the details: **RFCs that do not