Update ADOPTERS.md (#3889)
Update ADOPTERS.md (#3889)

Added Aserto and a description of product and contributions.

Signed-off-by: Omri Gazitt <198ca66d5b94ba3bec9bf9ccbeec4d9d6578488f@gmail.com>
tsandall/opa,open-policy-agent/opa,open-policy-agent/opa,tsandall/opa,tsandall/opa,tsandall/opa,open-policy-agent/opa,tsandall/opa,tsandall/opa,open-policy-agent/opa,open-policy-agent/opa,open-policy-agent/opa