fix: embed pdf aspect ratio (closes #1310)

Jacky Zhao

2024-08-06 3938904cd096205b27741538655c3fb18cd401be

 quartz/plugins/transformers/gfm.ts

@@ -32,6 +32,7 @@
            {
              behavior: "append",
              properties: {
                role: "anchor",
                ariaHidden: true,
                tabIndex: -1,
                "data-no-popover": true,