design-2.0-cluster-parameters: escape final _
design-2.0-cluster-parameters: escape final _

In rst a final _ is used for linking. Escaping it prevents an error at
compile time on design-2.0-cluster-parameters.rst

Reviewed-by: iustinp


mbakke/ganeti,onponomarev/ganeti,ganeti/ganeti,apyrgio/snf-ganeti,dimara/ganeti,onponomarev/ganeti,yiannist/ganeti,grnet/snf-ganeti,grnet/snf-ganeti,andir/ganeti,ganeti-github-testing/ganeti-test-1,mbakke/ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,leshchevds/ganeti,apyrgio/ganeti,apyrgio/snf-ganeti,andir/ganeti,mbakke/ganeti,apyrgio/ganeti,ganeti/ganeti,yiannist/ganeti,leshchevds/ganeti,yiannist/ganeti,leshchevds/ganeti,bitemyapp/ganeti,ganeti/ganeti,dimara/ganeti,andir/ganeti