electric-pair-text-pairs is a variable defined in `elec-pair.el'.
Its value is
((34 . 34))

Alist of pairs that should always be used in comments and strings.

Pairs of delimiters in this list are a fallback in case they have
no syntax relevant to `electric-pair-mode' in the syntax table
defined in `electric-pair-text-syntax-table'

You can customize this variable.