docs(replace): clearify plugin-replace delimiters typing

[krist7599555]

delimiters accept only pair of string. array of 3 or more element won't make any sense.

plugins/packages/replace/src/index.js

Lines 44 to 49 in 00e16d9

	const pattern = delimiters
	? new RegExp(
	`${escape(delimiters[0])}(${keys.join('|')})${escape(delimiters[1])}${lookahead}`,
	'g'
	)
	: new RegExp(`\\b(${keys.join('|')})\\b(?!\\.)${lookahead}`, 'g');

Rollup Plugin Name: @rollup/plugin-replace

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

If yes, then include "BREAKING CHANGES:" in the first commit message body, followed by a description of what is breaking.

List any relevant issue numbers:

Description