Only build the current site

Building across all branches requires supporting different versions of
Hugo depending on the branch. Release branches don't get a site
published anyway, so this changes the build check to only build the
current (PR) branch.

Signed-off-by: Stephen Kitt <skitt@redhat.com>

Author: skitt

.github/workflows/build.yml

@@ -17,7 +17,7 @@ jobs:
           fetch-depth: 0
 
       - name: Build the website static files
-        run: make static-all
+        run: make static
 
       - name: Upload proposed static website for review
         uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f