Another build patch

Signed-off-by: Thomas A. Christensen II <25492070+MillironX@users.noreply.github.com>

.github/workflows/build-site.yml

@@ -28,7 +28,7 @@ jobs:
           npm config set "//npm.fontawesome.com/:_authToken" ${{ secrets.FONTAWESOME_TOKEN }}
       - name: Install global npm packages
         run: |
-          npm -g install postcss@8.4.6 postcss-cli@9.1.0 postcss-purgecss@2.0.3
+          npm -g install postcss@8.4.6 postcss-cli@9.1.0 @fullhuman/postcss-purgecss@2.0.3
       - name: Install local npm packages
         run: |
           cd assets