Update SAP adoption info in USERS.md
Update SAP adoption info in USERS.md

As discussed with @dragan , updating the SAP Concur record to include broader adoption at SAP.

Signed-off-by: Pavel Pavlov <1c0e61982f4e90dc67c9ba9b3e65681391f47816@sap.com>
michi-covalent/cilium,cilium/cilium,michi-covalent/cilium,michi-covalent/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium,michi-covalent/cilium,cilium/cilium,cilium/cilium