feat: use universal macos builds in run.sh

Author: ginkoid

README.md

@@ -20,7 +20,7 @@ redpwnpow challenge
 ## kCTF
 
 redpwnpow can be used as a drop-in replacement for [kCTF](https://google.github.io/kctf/)'s proof of work solver.
-redpwnpow is approximately **10x** faster than kCTF's [Python solver](https://github.com/google/kctf/blob/v1.0/docker-images/challenge/pow.py).
+redpwnpow is approximately **10x faster** than kCTF's [Python solver](https://github.com/google/kctf/blob/v1.0/docker-images/challenge/pow.py).
 
 ## Go module
 

cmd/redpwnpow/run.sh

@@ -13,7 +13,7 @@ run() {
         arm*) release=linux-armv6l;;
         *) echo unknown linux architecture >&2; exit 1
       esac;;
-    darwin*) release=darwin-amd64;;
+    darwin*) release=darwin;;
     msys*|mingw*|cygwin*) release=windows-amd64.exe;;
     *) echo unknown operating system >&2; exit 1
   esac