Zephyr website: Update Benefits page

[MeganHansen]

On the benefits page (https://www.zephyrproject.org/benefits/), please:

1. Update the Security section to:

• include the following as the third bullet point: "Includes CNA with Product Security Incident Response Team (PSIRT) response team"

• remove the fifth bullet: "long term support" (it's going to appear in a new section, as noted below)

2. Add an entirely new third section (above "Powerful") called "Product Ready", with the following two bullet points:

• Long term support (LTS) with security updates

• Certification-ready with Auditable

3. Under "Connected",

• remove the "star" next to "Wi-Fi*" (since there is no supporting footnote).

• update the last bullet so that it reads "Supports standards like 6LoWPAN, CoAP, IPv4, IPv6, Ethernet, USB, CAN and Thread

[bprestonlf]

@MeganHansen - https://www.zephyrproject.org/benefits/ has been updated