Add missing commas to app-custom-theme docs

Signed-off-by: Víctor Suárez Fernández <vicsufer@gmail.com>
Signed-off-by: Víctor <vsuarez@idealista.com>

docs/getting-started/app-custom-theme.md

@@ -88,7 +88,7 @@ const themeOptions = createThemeOptions({
       main: '#123456',
     },
     error: {
-      main: '#123456'
+      main: '#123456',
     },
     warning: {
       main: '#123456',
@@ -105,17 +105,17 @@ const themeOptions = createThemeOptions({
     },
     banner: {
       info: '#123456',
-      error: '#123456'
-      text: '#123456'
+      error: '#123456',
+      text: '#123456',
       link: '#123456',
     },
-    errorBackground: '#123456'
-    warningBackground: '#123456'
-    infoBackground: '#123456'
+    errorBackground: '#123456',
+    warningBackground: '#123456',
+    infoBackground: '#123456',
     navigation: {
       background: '#123456',
-      indicator: '#123456'
-      color: '#123456'
+      indicator: '#123456',
+      color: '#123456',
       selectedColor: '#123456',
     },
   },