minor #2418 [Autocomplete] Added polish translation for "Add ..." message (skmedix)

This PR was merged into the 2.x branch.

Discussion
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[Autocomplete] Added polish translation for "Add ..." message

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| Issues        | Fix #... <!-- prefix each issue number with "Fix #", no need to create an issue if none exist, explain below instead -->
| License       | MIT

The change involves translating the placeholder text for adding items.

Commits
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f5f01f4 [Autocomplete] Added polish translation for "Add ..." message

Author: javiereguiluz

src/Autocomplete/translations/AutocompleteBundle.pl.php

@@ -13,5 +13,5 @@
     'Loading more results...' => 'Wczytywanie więcej wyników...',
     'No results found' => 'Brak wyników',
     'No more results' => 'Brak więcej wyników',
-    // 'Add %placeholder%...' => 'Add %placeholder%...',
+    'Add %placeholder%...' => 'Dodaj %placeholder%...',
 ];