Install runtime as root

Author: mattrubin

.github/actions/prepare-simulator/action.yml

@@ -38,7 +38,7 @@ runs:
           echo "::group::Available runtimes:"
           xcodes runtimes
           echo "::endgroup::"
-          xcodes runtimes install "$RUNTIME";
+          sudo xcodes runtimes install "$RUNTIME";
         fi
 
     - name: "Create and boot simulator"