Update 9.5 blog post to correct due date for Git Storage config
We decided not to remove support for the legacy Git Storage config types in GitLab 10, due to the prevalence of the config and being hard to debug. We are adding a feature in %10.1 to make Omnibus deprecations more apparent, which will allow us to deprecate in a future release. (We are announcing Mar 22, 6 months from 10.0)
We should change the due date in the 9.5 blog post so we do not confuse people with the difference between the two posts.