github: fix binary name

Author: Lucas V. R

.github/workflows/build.yml

@@ -73,7 +73,7 @@ jobs:
 
       - name: Output executable
         run: |
-          cabal install all:exes --install-method=copy --installdir=target --program-suffix='${{ matrix.os }}-${{ github.ref_name }}'
+          cabal install all:exes --install-method=copy --installdir=target --program-suffix='-${{ matrix.os }}-${{ github.ref_name }}'
         if: ${{ matrix.executable }}
 
       - name: Compress binaries