decompressor: fix logs and docs (#11393)

Signed-off-by: Jose Nino <jnino@lyft.com>

Mirrored from https://github.com/envoyproxy/envoy @ 3b52fc36373272902d9817f0db97dd2fccc40784

envoy/extensions/compression/gzip/decompressor/v3/gzip.proto

@@ -20,8 +20,9 @@ option (udpa.annotations.file_status).package_version_status = ACTIVE;
 message Gzip {
   // Value from 9 to 15 that represents the base two logarithmic of the decompressor's window size.
   // The decompression window size needs to be equal or larger than the compression window size.
-  // The default is 15 per zlib's manual. For more details about this parameter, please refer to
-  // zlib manual > inflateInit2.
+  // The default is 12 to match the default in the
+  // :ref:`gzip compressor <envoy_api_field_extensions.compression.gzip.compressor.v3.Gzip.window_bits>`.
+  // For more details about this parameter, please refer to `zlib manual <https://www.zlib.net/manual.html>`_ > inflateInit2.
   google.protobuf.UInt32Value window_bits = 1 [(validate.rules).uint32 = {lte: 15 gte: 9}];
 
   // Value for zlib's decompressor output buffer. If not set, defaults to 4096.