Improve polish banner in banner.js (#222)

Read the fu*king code to know exactly what I did

Author: hakergeniusz

public/banner.js

@@ -41,7 +41,7 @@
     id:      "Android akan menjadi platform yang terkunci.",
     it:      "Android diventer\u00E0 una piattaforma bloccata",
     ko:      "Android\uAC00 \uD3D0\uC1C4\uB41C \uD50C\uB7AB\uD3FC\uC774 \uB418\uAE30\uAE4C\uC9C0 \uB0A8\uC740 \uC2DC\uAC04:",
-    pl:      "Android stanie si\u0119 platform\u0105 zamkni\u0119t\u0105",
+    pl:      "Android stanie si\u0119 platform\u0105 zamkni\u0119t\u0105 za",
     "pt-BR": "O Android se tornar\u00E1 uma plataforma fechada",
     ru:      "Android \u0441\u0442\u0430\u043D\u0435\u0442 \u0437\u0430\u043A\u0440\u044B\u0442\u043E\u0439 \u043F\u043B\u0430\u0442\u0444\u043E\u0440\u043C\u043E\u0439 \u0447\u0435\u0440\u0435\u0437",
     sk:      "Android sa stane uzamknutou platformou",