Fix build.gradle file to prevent warning.

Author: Chris Bellew

Voice Control For Plex/build.gradle

@@ -59,7 +59,7 @@ gradle.taskGraph.whenReady { taskGraph ->
                 ) {
                     vbox { // Put everything below each other
                         label(text: "!Please enter key passphrase:")
-                        input = passwordField()
+                        def input = passwordField()
                         button(defaultButton: true, text: 'OK', actionPerformed: {
                             pass = new String(input.password); // Set pass variable to value of input field
                             dispose(); // Close dialog