docs: fix wasm plugin traffic selector docs (#2748)

Signed-off-by: Pratyush Singhal <psinghal20@gmail.com>

Author: psinghal20

extensions/v1alpha1/wasm.pb.go

@@ -321,7 +321,7 @@ message WasmPlugin {
   // traffic will be selected.
   message TrafficSelector {
     // Criteria for selecting traffic by their direction.
-    // Note that CLIENT and SERVER are analogous to INBOUND and OUTBOUND,
+    // Note that CLIENT and SERVER are analogous to OUTBOUND and INBOUND,
     // respectively.
     // For the gateway, the field should be CLIENT or CLIENT_AND_SERVER.
     // If not specified, the default value is CLIENT_AND_SERVER.