Update src/Compiler.jl

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: avik-pal

src/Compiler.jl

@@ -1655,7 +1655,7 @@ function compile_mlir!(
                 dus_to_concat=true,
                 recognize_comms,
                 lower_comms,
-                backend
+                backend,
             )
             result = result * "," * opt_passes3
         end