Added markdown cheatsheet (#5971)

AR10X · web-flow · commit 25e802776879 · 2021-10-06T10:24:12.000-04:00
diff --git a/more/free-programming-cheatsheets.md b/more/free-programming-cheatsheets.md
@@ -133,6 +133,7 @@
 
 ### Markdown
 
+* [Markdown Cheat Sheet](https://www.markdownguide.org/cheat-sheet/) - Markdown Guide (HTML)
 * [Markdown Here](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet) - Adam Pritchard
 
 

Original file line number	Diff line number	Diff line change
`@@ -133,6 +133,7 @@`
`133`	`133`
`134`	`134`	`### Markdown`
`135`	`135`
	`136`	`+* [Markdown Cheat Sheet](https://www.markdownguide.org/cheat-sheet/) - Markdown Guide (HTML)`
`136`	`137`	`* [Markdown Here](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet) - Adam Pritchard`
`137`	`138`
`138`	`139`