docs: pin all python requirements (#929)
docs: pin all python requirements (#929)


eklitzke/envoy,fengli79/envoy,tschroed/envoy,lizan/envoy,dnoe/envoy,fengli79/envoy,envoyproxy/envoy-wasm,amalgam8/envoy,lyft/envoy,dnoe/envoy,envoyproxy/envoy,eklitzke/envoy,envoyproxy/envoy,envoyproxy/envoy,sebrandon1/envoy,tdmackey/envoy,lizan/envoy,sebrandon1/envoy,envoyproxy/envoy,fengli79/envoy,lyft/envoy,istio/envoy,rlazarus/envoy,envoyproxy/envoy-wasm,jrajahalme/envoy,eklitzke/envoy,tdmackey/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,lizan/envoy,envoyproxy/envoy,eklitzke/envoy,craffert0/envoy,envoyproxy/envoy,envoyproxy/envoy-wasm,envoyproxy/envoy-wasm,htuch/envoy,envoyproxy/envoy,tdmackey/envoy,htuch/envoy,tdmackey/envoy,rlazarus/envoy,envoyproxy/envoy,craffert0/envoy,fengli79/envoy,jrajahalme/envoy,sebrandon1/envoy,istio/envoy,istio/envoy,jrajahalme/envoy,envoyproxy/envoy,tschroed/envoy,istio/envoy,amalgam8/envoy,lyft/envoy,istio/envoy,dnoe/envoy,eklitzke/envoy,envoyproxy/envoy,lizan/envoy,rlazarus/envoy,envoyproxy/envoy,craffert0/envoy,lyft/envoy,dnoe/envoy,jrajahalme/envoy,dnoe/envoy,istio/envoy,envoyproxy/envoy-wasm,amalgam8/envoy,lyft/envoy,craffert0/envoy,sebrandon1/envoy,tschroed/envoy,jrajahalme/envoy,rlazarus/envoy,eklitzke/envoy,lyft/envoy,amalgam8/envoy,lizan/envoy,jrajahalme/envoy,htuch/envoy,istio/envoy,envoyproxy/envoy,sebrandon1/envoy,lizan/envoy