Add hint to minimum Director version v262
Add hint to minimum Director version v262

[#141967195](https://www.pivotaltracker.com/story/show/141967195)

Signed-off-by: Tom Kiemes <2e6bc7bf64c2cabd57fd2be0c1baf57f97b6fecc@sap.com>

cloudfoundry/docs-bosh