Added markdown notes to the KB

knowledge base/markdown.md

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+# Markdown
+
+## Troubleshooting
+
+### Escape the backtick character
+
+Include a non-code formatted backtick by escaping it normally (with a `\`).
+
+Render it in an inline code block using double backticks instead of single backticks.
+
+Alternatively, use a code block. This will wrap everything in a `<pre>` HTML tag.  
+To do this, either indent 4 spaces to start a code block, or use fenced code blocks if supported.
+
+## Sources
+
+- [Escaping backtick in Markdown]
+
+[escaping backtick in markdown]: https://www.growingwiththeweb.com/2015/06/escaping-backtick-in-markdown.html