docs: handling of missing ssse3 instruction set (#21159)
docs: handling of missing ssse3 instruction set (#21159)

Fixes #21100 
handling of missing ssse3 instruction set for proxmox virtual machine

Signed-off-by: Hao Tu <03de4a1b963f61210e58ed32ccee70c79d2d2035@alauda.io>
envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy,envoyproxy/envoy