Fix wrong location to wait for

Author: schloerke

inst/apps/301-bs-themes/tests/testthat/test-themes.R

@@ -112,7 +112,7 @@ for (theme_name in names(themes)) {
     appshot()
 
     app$set_inputs(navbar = "Tables", timeout_ = 10 * 1000)
-    app$wait_for_value(output = "DT_rows_current")
+    app$wait_for_value(input = "DT_rows_current")
     appshot()
 
     app$set_inputs(navbar = "Fonts")