Update libwfkafka to v0.11.6

packages/l/libwfkafka/xmake.lua

@@ -6,6 +6,7 @@ package("libwfkafka")
     add_urls("https://github.com/sogou/workflow/archive/refs/tags/$(version).tar.gz",
              "https://github.com/sogou/workflow.git")
 
+    add_versions("v0.11.6", "e32d079d3a4ebe29d094166252190f3437bee2c6aaf5a2314a30607706bfe3dc")
     add_versions("v0.11.5", "e37ba93c59da1fbeadb4f1ca413e6d26a3d8979aa00a806c0129f84e92b7925a")
     add_versions("v0.10.6", "5701ef31518a7927e61b26cd6cc1d699cb43393bf1ffc77fa61e73e64d2dd28e")
     add_versions("v0.10.7", "aa9806983f32174597549db4a129e2ee8a3d1f005923fcbb924906bc70c0e123")