docs: Remove the redundant words 'the the' (#6046)

Co-Authored-By: Nguyen Phuong An <AnNP@vn.fujitsu.com>
Signed-off-by: Kim Bao Long <longkb@vn.fujitsu.com>

Mirrored from https://github.com/envoyproxy/envoy @ 15f1c56397ff404fc98fb3381725bbe48c205234

envoy/config/filter/http/ext_authz/v2/ext_authz.proto

@@ -41,7 +41,7 @@ message ExtAuthz {
   // <config_http_filters_ext_authz_stats>`.
   bool failure_mode_allow = 2;
 
-  // Sets the package version the the gRPC service should use. This is particularly
+  // Sets the package version the gRPC service should use. This is particularly
   // useful when transitioning from alpha to release versions assuming that both definitions are
   // semantically compatible. Deprecation note: This field is deprecated and should only be used for
   // version upgrade. See release notes for more details.

envoy/service/auth/v2/external_auth.proto

@@ -40,11 +40,11 @@ message DeniedHttpResponse {
   envoy.type.HttpStatus status = 1 [(validate.rules).message.required = true];
 
   // This field allows the authorization service to send HTTP response headers
-  // to the the downstream client.
+  // to the downstream client.
   repeated envoy.api.v2.core.HeaderValueOption headers = 2;
 
   // This field allows the authorization service to send a response body data
-  // to the the downstream client.
+  // to the downstream client.
   string body = 3;
 }