Apply suggestion from @hugovk

Co-authored-by: Hugo van Kemenade <[email protected]>

Author: methane

peps/pep-0822.rst

@@ -258,7 +258,7 @@ However, d-string is more suitable for multiline string literals because:
 Triple-backtick
 ---------------
 
-It is considered that `using triple backquotes <https://discuss.python.org/t/40679>`__
+It is considered that `using triple backticks <https://discuss.python.org/t/40679>`__
 for dedented multiline strings could be an alternative syntax.
 This notation is familiar to us from Markdown. While there were past concerns about certain keyboard layouts,
 nowadays many people are accustomed to typing this notation.