GitHub-flavored Markdown does not use C-style escapes for escaping backticks inside spans. Instead, GFM uses double, significant whitespaced, backticks.
Two backticks, then a space, then a backtick, then a space, then two more backticks:
`` ` ``
produces:
`
The stuff between the double backticks is escaped so your example would look exactly the same surrounded by a pair of double back ticks.