Update limits info

[boshevski]

Specify that the segment limits are per project. Also that the bandwidth is per month.

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 7985c4a):

https://storj-docs--pr277-boshevski-patch-1-w1gnb4lq.web.app

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[amozoss]

@boshevski feel free to merge if the change viewed via the preview link looks good to you. Happy to review, but they're not required.