[Update] Update Cloud Manager Guides to Reflect Style Guide Changes

[andystevensname]

Update 15 Cloud Manager guides to incorporate the style guide changes we have made.

find ~/Documents/linode/docs/docs -type d -name "*new-manager" -print
/Users/astevens/Documents/linode/docs/docs/quick-answers/linode-platform/reset-the-root-password-on-your-linode-new-manager
/Users/astevens/Documents/linode/docs/docs/quick-answers/linode-platform/resize-a-linode-disk-new-manager
/Users/astevens/Documents/linode/docs/docs/security/linode-manager-security-controls-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/block-storage/how-to-use-block-storage-with-your-linode-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/manager/dns-manager-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/manager/accounts-and-passwords-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/network-helper-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/api/getting-started-with-the-linode-api-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/nodebalancer/getting-started-with-nodebalancers-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/nodebalancer/nodebalancer-reference-guide-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/stackscripts-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/disk-images/linode-backup-service-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/disk-images/linode-images-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/billing-and-support/support-new-manager
/Users/astevens/Documents/linode/docs/docs/platform/billing-and-support/billing-and-payments-new-manager
/Users/astevens/Documents/linode/docs/docs/getting-started-new-manager
/Users/astevens/Documents/linode/docs/docs/uptime/monitoring-and-maintaining-your-server-new-manager