package/unbound: bump version to 1.10.1 for security fixes

Fixes the following security vulnerabilities:

CVE-2020-12662: Unbound can be tricked into amplifying an incoming query
  into a large number of queries directed to a target.

CVE-2020-12663: Malformed answers from upstream name servers can be used
  to make Unbound unresponsive.

Signed-off-by: Stefan Ott <stefan@ott.net>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>