add cross link to new lua function from version history

Signed-off-by: Michael Puncel <[email protected]>

docs/root/configuration/http/http_filters/lua_filter.rst

@@ -424,6 +424,8 @@ the length of the signature. *data* is the content which will be hashed. *dataLe
 The function returns a pair. If the first element is *true*, the second element will be empty
 which means signature is verified; otherwise, the second element will store the error message.
 
+.. _config_http_filters_lua_stream_handle_api_base64_escape:
+
 base64Escape()
 ^^^^^^^^^^^^^^
 .. code-block:: lua

docs/root/version_history/current.rst

@@ -58,7 +58,7 @@ New Features
 * http: introduced new HTTP/1 and HTTP/2 codec implementations that will remove the use of exceptions for control flow due to high risk factors and instead use error statuses. The old behavior is used by default, but the new codecs can be enabled for testing by setting the runtime feature `envoy.reloadable_features.new_codec_behavior` to true. The new codecs will be in development for one month, and then enabled by default while the old codecs are deprecated.
 * load balancer: added a :ref:`configuration<envoy_v3_api_msg_config.cluster.v3.Cluster.LeastRequestLbConfig>` option to specify the active request bias used by the least request load balancer.
 * lua: added Lua APIs to access :ref:`SSL connection info <config_http_filters_lua_ssl_socket_info>` object.
-* lua: added Lua API for base64 escaping a string.
+* lua: added Lua API for :ref:`base64 escaping a string <config_http_filters_lua_stream_handle_api_base64_escape>`.
 * postgres network filter: :ref:`metadata <config_network_filters_postgres_proxy_dynamic_metadata>` is produced based on SQL query.
 * ratelimit: added :ref:`enable_x_ratelimit_headers <envoy_v3_api_msg_extensions.filters.http.ratelimit.v3.RateLimit>` option to enable `X-RateLimit-*` headers as defined in `draft RFC <https://tools.ietf.org/id/draft-polli-ratelimit-headers-03.html>`_.
 * router: added new