avoid markdown tofu

The markdown renderer used here fails to handle this non-ascii character:
https://chromium.googlesource.com/chromium/src/+/3224cfecf5bcdd37378f54ec1751d790c79cb00f/docs/new_port_policy.md

TBR=jam@chromium.org

Change-Id: I82511db8e377488d87be767fe0b15dbcacb7e04e
Reviewed-on: https://chromium-review.googlesource.com/779124
Commit-Queue: Mostyn Bramley-Moore <mostynb@vewd.com>
Reviewed-by: Mostyn Bramley-Moore <mostynb@vewd.com>
Cr-Commit-Position: refs/heads/master@{#517892}
1 file changed