fix(markdown): export html custom data

Signed-off-by: John Yanarella <jyanarella@nvidia.com>

Author: johnyanarella

projects/markdown/package.json

@@ -40,6 +40,7 @@
 "exports": {
 "./package.json": "./package.json",
 "./custom-elements.json": "./dist/custom-elements.json",
+"./data.html.json": "./dist/data.html.json",
 "./*.examples.json": "./dist/*.examples.json",
 ".": {
 "types": "./dist/index.d.ts",