ci: install luarock

Author: ligurio

.github/workflows/publish.yaml

@@ -63,3 +63,8 @@ jobs:
       - run: luarocks --local build luzer-scm-1.rockspec
 
       - run: luarocks --local make
+
+      - run: |
+          luarocks --local install luzer-scm-1.rockspec
+          eval $(luarocks path)
+          lua -l luzer