Fixing pkgconfig link and unlink

Author: filipecosta90

.github/workflows/ci.yml

@@ -127,7 +127,7 @@ jobs:
         if ! brew list --versions pkgconf > /dev/null; then
           brew install pkgconf
         fi
-        brew link --overwrite pkgconf
+        brew unlink pkgconf && brew link pkgconf
     - name: Build
       run: autoreconf -ivf && PKG_CONFIG_PATH=`brew --prefix openssl@${{ matrix.openssl }}`/lib/pkgconfig ./configure && make