Update third_party.md
Common Lisp:
http://github.com/ndantam/s-protobuf hasn't been updated in 5 years, and hasn't had a real update in 8.
http://github.com/qitab/cl-protobuf is the one used internally and maintained by Googlers (third_party/lisp/cl-protobufs) though I don't know
how to or if I should express that.
diff --git a/docs/third_party.md b/docs/third_party.md
index c1726a0..ceb14ee 100644
--- a/docs/third_party.md
+++ b/docs/third_party.md
@@ -26,8 +26,8 @@
* Clojure: http://github.com/ninjudd/clojure-protobuf
* Clojure: https://github.com/clojusc/protobuf
* Clojure: https://protojure.github.io
-* Common Lisp: http://github.com/ndantam/s-protobuf
* Common Lisp: http://github.com/brown/protobuf
+* Common Lisp: http://github.com/qitab/cl-protobuf
* D: https://github.com/dcarp/protobuf-d
* D: https://github.com/msoucy/dproto
* D: https://github.com/opticron/ProtocolBuffer
