patch 8.2.4092: MacOS CI: unnecessarily doing "Install packages"

Problem:    MacOS CI: unnecessarily doing "Install packages".
Solution:   Only do "Install packages" for huge build.  (Ozaki Kiichi,
            closes #9521)

.github/workflows/ci.yml

@@ -63,6 +63,7 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Install packages
+        if: matrix.features == 'huge'
         run: |
           sudo apt update && sudo apt install -y \
             autoconf \