[css-rhythm-1] Add acknowledgements

kojiishi · kojiishi · commit 94d4f0ef5683 · 2017-11-06T23:18:37.000+09:00
diff --git a/css-rhythm-1/Overview.bs b/css-rhythm-1/Overview.bs
@@ -499,6 +499,7 @@ Acknowledgments {#acks}
 	This specification would not have been possible without the help from:
 	Takao Baba,
 	Chris Eppstein,
+	Jxck,
 	Shinyu Murakami,
 	Tsutomu Nanjo,
 	Charlie Neely,
