verilator_4_016 --> v4.016 (#1459) (#1464)

Co-authored-by: mergify[bot] <37929162+mergify[bot]@users.noreply.github.com>
(cherry picked from commit 803ccbb)

Co-authored-by: apaj <aleksandar.pajkanovic@gmail.com>

SETUP.md

@@ -39,7 +39,7 @@ Note that both [PeekPokeTester](https://github.com/freechipsproject/chisel-teste
     3.  In the Verilator repository directory, check out a known good version:	
         ```	
         git pull	
-        git checkout verilator_4_016	
+        git checkout v4.016	
         ```
 
     4.  In the Verilator repository directory, build and install: