docs: document type URLs for extensions (#21707)

Signed-off-by: Kuat Yessenov <kuat@google.com>

Mirrored from https://github.com/envoyproxy/envoy @ 78e54060c88803137c656cb9e14de3db1e5a6047

envoy/extensions/access_loggers/stream/v3/stream.proto

@@ -14,10 +14,10 @@ option go_package = "github.com/envoyproxy/go-control-plane/envoy/extensions/acc
 option (udpa.annotations.file_status).package_version_status = ACTIVE;
 
 // [#protodoc-title: Standard Streams Access loggers]
-// [#extension: envoy.access_loggers.stream]
 
 // Custom configuration for an :ref:`AccessLog <envoy_v3_api_msg_config.accesslog.v3.AccessLog>`
 // that writes log entries directly to the operating system's standard output.
+// [#extension: envoy.access_loggers.stdout]
 message StdoutAccessLog {
   oneof access_log_format {
     // Configuration to form access log data and format.
@@ -29,6 +29,7 @@ message StdoutAccessLog {
 
 // Custom configuration for an :ref:`AccessLog <envoy_v3_api_msg_config.accesslog.v3.AccessLog>`
 // that writes log entries directly to the operating system's standard error.
+// [#extension: envoy.access_loggers.stderr]
 message StderrAccessLog {
   oneof access_log_format {
     // Configuration to form access log data and format.

envoy/extensions/cache/simple_http_cache/v3/config.proto

@@ -12,6 +12,6 @@ option (udpa.annotations.file_status).package_version_status = ACTIVE;
 
 // [#protodoc-title: SimpleHttpCache CacheFilter storage plugin]
 
-// [#extension: envoy.cache.simple_http_cache]
+// [#extension: envoy.extensions.http.cache.simple]
 message SimpleHttpCacheConfig {
 }

envoy/extensions/filters/http/cache/v3/cache.proto

@@ -50,7 +50,7 @@ message CacheConfig {
   }
 
   // Config specific to the cache storage implementation.
-  // [#extension-category: envoy.filters.http.cache]
+  // [#extension-category: envoy.http.cache]
   google.protobuf.Any typed_config = 1 [(validate.rules).any = {required: true}];
 
   // List of matching rules that defines allowed *Vary* headers.