readme: deprecate v4

Author: markus-wa

README.md

@@ -19,16 +19,12 @@ For business inquiries please use the contact information found on the [GitHub p
 
 ## Go Get
 
-### Counter-Strike 2 + Live Broadcast Parsing - aka. CSTV+ (BETA)
+### Counter-Strike 2 + Live Broadcast Parsing - aka. CSTV+
 
 	go get -u github.com/markus-wa/demoinfocs-golang/v5/pkg/demoinfocs
 
 See [v5 branch with broadcast example](https://github.com/markus-wa/demoinfocs-golang/tree/v5/examples/broadcasts)
 
-### Counter-Strike 2
-
-	go get -u github.com/markus-wa/demoinfocs-golang/v5/pkg/demoinfocs
-
 ### CS:GO
 
 	go get -u github.com/markus-wa/demoinfocs-golang/v3/pkg/demoinfocs