fix: links to index not showing in graph (closes #450)

Jacky Zhao

2023-09-07 2525bfbab5553f970997ea3c60af180cbef1fdd2

 quartz/plugins/transformers/lastmod.ts

@@ -36,6 +36,7 @@
              } else if (source === "frontmatter" && file.data.frontmatter) {
                created ||= file.data.frontmatter.date
                modified ||= file.data.frontmatter.lastmod
                modified ||= file.data.frontmatter.updated
                modified ||= file.data.frontmatter["last-modified"]
                published ||= file.data.frontmatter.publishDate
              } else if (source === "git") {