JavaScript allows the use of both single (<code>'</code>) and double (<code>"</code>) quotes to declare a string. Deciding which one to use generally comes down to personal preference, with some exceptions.
Having two choices is great when a string has contractions or another piece of text that's in quotes. Just be careful that you don't close the string too early, which causes a syntax error.
Of course, it is okay to use only one style of quotes. You can escape the quotes inside the string by using the backslash (<code>\\</code>) escape character:
Fix the string so it either uses different quotes for the <code>href</code> value, or escape the existing ones. Keep the double quote marks around the entire string.