Fix Missing Flag (#3338)

* Atualização Português do Brasil

Atualizado para a última versão.

* Flag fix

Added reference for the missing flag Spanish Latin America

* Update Flag

As discussed in discord with @Hipnosis183 told us that is better change to Mexico flag instead for his lang option.

src/duckstation-qt/resources/duckstation-qt.qrc

@@ -151,6 +151,7 @@
 		<file>icons/flags/en@2x.png</file>
 		<file>icons/flags/en.png</file>
 		<file>icons/flags/es-ES@2x.png</file>
+		<file>icons/flags/es.png</file>
 		<file>icons/flags/es-ES.png</file>
 		<file>icons/flags/fr@2x.png</file>
 		<file>icons/flags/fr.png</file>