.github/workflows/dnmtools_release_macos.yml: using threads to build htslib

Author: andrewdavidsmith

.github/workflows/dnmtools_release_macos.yml

@@ -36,7 +36,7 @@ jobs:
             --disable-ref-cache \
             --without-libdeflate \
             LDADD="-L/usr/local/lib"
-          make CFLAGS="-Wall -O2 -fvisibility=hidden" libhts.a
+          make -j4 CFLAGS="-Wall -O2 -fvisibility=hidden" libhts.a
           sudo cp libhts.a /opt/dnmtools/lib
       - name: Build dnmtools
         run: |