html: test: use 'data' uritype to increase compatibility
html: test: use 'data' uritype to increase compatibility

This gets it working on an older Hongmi device we've got.

Signed-off-by: Sean Cross <d7e19930cc1f42c2d0781f4d9e6f1fe5891bf9cf@xobs.io>

chibitronics/ltc-webview-layer,chibitronics/ltc-webview-layer,chibitronics/ltc-webview-layer,chibitronics/ltc-webview-layer