Include srcDir in the source path reported by dead links plugin

[adiroiban]

I have a site configured as

export default defineConfig({
    srcDir: 'content',

When there in dead link detect in the file content/product/roadmap.md the report is

(!) Found dead link /articles/tag-release-1 in file product/roadmap.md

It would be nice to have the full path to the source file

I think that the affected code is this one

vitepress/src/node/plugin.ts

Lines 237 to 244 in a248995

	renderStart() {
	if (allDeadLinks.length > 0) {
	allDeadLinks.forEach(({ url, file }, i) => {
	siteConfig.logger.warn(
	c.yellow(
	`${i === 0 ? '\n\n' : ''}(!) Found dead link ${c.cyan(
	url
	)} in file ${c.white(c.dim(file))}`

[adiroiban]

Thanks. Much appreciated!