DROP BEFORE MERGE: CI: Point to the right branches

Author: kaushikcfd

.github/workflows/build.yml

@@ -83,6 +83,8 @@ jobs:
             --install defcon \
             --install gadopt \
             --install asQ \
+            --package-branch tsfc gpu --package-branch pyop2 gpu \
+
             || (cat firedrake-install.log && /bin/false)
       - name: Install test dependencies
         run: |