made api address input fields in intro_screen more beautiful

lib/screens/intro_screen.dart

@@ -161,8 +161,11 @@ class _IntroScreenState extends State<IntroScreen> {
                     ],
                   ),
                   const SizedBox(
-                    height: 15,
+                    height: 25,
                   ),
+                  Align(
+                    alignment: Alignment.bottomLeft,
+                    child: Text(AppLocalizations.of(context)!.ffApiAddress)),
                   Row(
                     children: [
                       Expanded(
@@ -199,6 +202,11 @@ class _IntroScreenState extends State<IntroScreen> {
                           ))
                     ],
                   ),
+                  const SizedBox(height: 10,),
+
+                  Align(
+                    alignment: Alignment.bottomLeft,
+                    child: Text(AppLocalizations.of(context)!.exApiAddress)),
                   Row(
                     children: [
                       Expanded(