docs: Adds back Xinyang's cs garden to showcase (#1323)

Xinyang Yu

2024-08-09 12904ab7960edc3bedd77c65cf5e6a5d599d882d

 quartz/plugins/transformers/ofm.ts

@@ -263,7 +263,7 @@
                  } else if ([".pdf"].includes(ext)) {
                    return {
                      type: "html",
                      value: `<iframe src="${url}"></iframe>`,
                      value: `<iframe src="${url}" class="pdf"></iframe>`,
                    }
                  } else {
                    const block = anchor