Replace date with version and release from README

CHANGELOG has the date.

Bug: webm:1752
Change-Id: I2888ce2afed8619f043eee1e9ca23bdf9d75e607
diff --git a/README b/README
index a083ebf..477a145 100644
--- a/README
+++ b/README
@@ -1,4 +1,4 @@
-README - 08 March 2021
+v1.12.0 Torrent Duck
 
 Welcome to the WebM VP8/VP9 Codec SDK!